markdowns: rename "master" branch references to "main"

Signed-off-by: Gyuho Lee <leegyuho@amazon.com>

CHANGELOG-3.1.md

@@ -1,6 +1,6 @@
 
 
-Previous change logs can be found at [CHANGELOG-3.0](https://github.com/etcd-io/etcd/blob/master/CHANGELOG-3.0.md).
+Previous change logs can be found at [CHANGELOG-3.0](https://github.com/etcd-io/etcd/blob/main/CHANGELOG-3.0.md).
 
 
 The minimum recommended etcd versions to run in **production** are 3.1.11+, 3.2.26+, and 3.3.11+.
@@ -21,7 +21,7 @@ The minimum recommended etcd versions to run in **production** are 3.1.11+, 3.2.
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -44,7 +44,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.19...v3.1.20) an
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -88,7 +88,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.18...v3.1.19) an
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -130,7 +130,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.17...v3.1.18) an
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -214,7 +214,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.13...v3.1.14) an
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -254,7 +254,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.12...v3.1.13) an
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 

CHANGELOG-3.2.md

@@ -1,6 +1,6 @@
 
 
-Previous change logs can be found at [CHANGELOG-3.1](https://github.com/etcd-io/etcd/blob/master/CHANGELOG-3.1.md).
+Previous change logs can be found at [CHANGELOG-3.1](https://github.com/etcd-io/etcd/blob/main/CHANGELOG-3.1.md).
 
 
 The minimum recommended etcd versions to run in **production** are 3.2.28+, 3.3.18+, and 3.4.2+.
@@ -90,7 +90,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.2.28...v3.2.29) an
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 - Add [`etcd_server_client_requests_total` with `"type"` and `"client_api_version"` labels](https://github.com/etcd-io/etcd/pull/11687).
 
@@ -110,7 +110,7 @@ See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -150,7 +150,7 @@ Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -203,7 +203,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.2.24...v3.2.25) an
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -247,7 +247,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.2.23...v3.2.24) an
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -307,7 +307,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.2.22...v3.2.23) an
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -393,7 +393,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.2.18...v3.2.19) an
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -442,7 +442,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.2.17...v3.2.18) an
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -749,7 +749,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.2.5...v3.2.6) and
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -781,7 +781,7 @@ See [security doc](https://etcd.io/docs/latest/op-guide/security/) for more deta
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -900,7 +900,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.2.0...v3.2.1) and
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -943,7 +943,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.1.0...v3.2.0) and
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 

CHANGELOG-3.3.md

@@ -1,6 +1,6 @@
 
 
-Previous change logs can be found at [CHANGELOG-3.2](https://github.com/etcd-io/etcd/blob/master/CHANGELOG-3.2.md).
+Previous change logs can be found at [CHANGELOG-3.2](https://github.com/etcd-io/etcd/blob/main/CHANGELOG-3.2.md).
 
 
 The minimum recommended etcd versions to run in **production** are 3.2.28+, 3.3.18+, and 3.4.2+.
@@ -166,7 +166,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.3.18...v3.3.19) an
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 - Add [`etcd_server_client_requests_total` with `"type"` and `"client_api_version"` labels](https://github.com/etcd-io/etcd/pull/11687).
 
@@ -186,7 +186,7 @@ See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -236,7 +236,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.3.15...v3.3.16) an
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -348,7 +348,7 @@ NOTE: This patch release had to include some new features from 3.4, while trying
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -377,9 +377,9 @@ Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 ### Package `pkg/adt`
 
 - Change [`pkg/adt.IntervalTree` from `struct` to `interface`](https://github.com/etcd-io/etcd/pull/10959).
-  - See [`pkg/adt` README](https://github.com/etcd-io/etcd/tree/master/pkg/adt) and [`pkg/adt` godoc](https://godoc.org/go.etcd.io/etcd/pkg/adt).
+  - See [`pkg/adt` README](https://github.com/etcd-io/etcd/tree/main/pkg/adt) and [`pkg/adt` godoc](https://godoc.org/go.etcd.io/etcd/pkg/adt).
 - Improve [`pkg/adt.IntervalTree` test coverage](https://github.com/etcd-io/etcd/pull/10959).
-  - See [`pkg/adt` README](https://github.com/etcd-io/etcd/tree/master/pkg/adt) and [`pkg/adt` godoc](https://godoc.org/go.etcd.io/etcd/pkg/adt).
+  - See [`pkg/adt` README](https://github.com/etcd-io/etcd/tree/main/pkg/adt) and [`pkg/adt` godoc](https://godoc.org/go.etcd.io/etcd/pkg/adt).
 - Fix [Red-Black tree to maintain black-height property](https://github.com/etcd-io/etcd/pull/10978).
   - Previously, delete operation violates [black-height property](https://github.com/etcd-io/etcd/issues/10965).
 
@@ -405,7 +405,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.3.12...v3.3.13) an
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -487,7 +487,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.3.9...v3.3.10) and
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -534,7 +534,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.3.8...v3.3.9) and
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -671,7 +671,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.3.3...v3.3.4) and
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -734,7 +734,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.3.2...v3.3.3) and
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
@@ -866,7 +866,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.2.0...v3.3.0) and
 
 ### Metrics, Monitoring
 
-See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+See [List of metrics](https://github.com/etcd-io/etcd/tree/main/Documentation/metrics) for all metrics per release.
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 

CHANGELOG-3.4.md

@@ -1,6 +1,6 @@
 
 
-Previous change logs can be found at [CHANGELOG-3.3](https://github.com/etcd-io/etcd/blob/master/CHANGELOG-3.3.md).
+Previous change logs can be found at [CHANGELOG-3.3](https://github.com/etcd-io/etcd/blob/main/CHANGELOG-3.3.md).
 
 
 The minimum recommended etcd versions to run in **production** are 3.2.28+, 3.3.18+, and 3.4.2+.
@@ -498,7 +498,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.3.0...v3.4.0) and
 - Make etcd server return `raft.ErrProposalDropped` on internal Raft proposal drop in [v3 applier](https://github.com/etcd-io/etcd/pull/9549) and [v2 applier](https://github.com/etcd-io/etcd/pull/9558).
   - e.g. a node is removed from cluster, or [`raftpb.MsgProp` arrives at current leader while there is an ongoing leadership transfer](https://github.com/etcd-io/etcd/issues/8975).
 - Add [`snapshot`](https://github.com/etcd-io/etcd/pull/9118) package for easier snapshot workflow (see [`godoc.org/github.com/etcd/clientv3/snapshot`](https://godoc.org/github.com/etcd-io/etcd/clientv3/snapshot) for more).
-- Improve [functional tester](https://github.com/etcd-io/etcd/tree/master/functional) coverage: [proxy layer to run network fault tests in CI](https://github.com/etcd-io/etcd/pull/9081), [TLS is enabled both for server and client](https://github.com/etcd-io/etcd/pull/9534), [liveness mode](https://github.com/etcd-io/etcd/issues/9230), [shuffle test sequence](https://github.com/etcd-io/etcd/issues/9381), [membership reconfiguration failure cases](https://github.com/etcd-io/etcd/pull/9564), [disastrous quorum loss and snapshot recover from a seed member](https://github.com/etcd-io/etcd/pull/9565), [embedded etcd](https://github.com/etcd-io/etcd/pull/9572).
+- Improve [functional tester](https://github.com/etcd-io/etcd/tree/main/functional) coverage: [proxy layer to run network fault tests in CI](https://github.com/etcd-io/etcd/pull/9081), [TLS is enabled both for server and client](https://github.com/etcd-io/etcd/pull/9534), [liveness mode](https://github.com/etcd-io/etcd/issues/9230), [shuffle test sequence](https://github.com/etcd-io/etcd/issues/9381), [membership reconfiguration failure cases](https://github.com/etcd-io/etcd/pull/9564), [disastrous quorum loss and snapshot recover from a seed member](https://github.com/etcd-io/etcd/pull/9565), [embedded etcd](https://github.com/etcd-io/etcd/pull/9572).
 - Improve [index compaction blocking](https://github.com/etcd-io/etcd/pull/9511) by using a copy on write clone to avoid holding the lock for the traversal of the entire index.
 - Update [JWT methods](https://github.com/etcd-io/etcd/pull/9883) to allow for use of any supported signature method/algorithm.
 - Add [Lease checkpointing](https://github.com/etcd-io/etcd/pull/9924) to persist remaining TTLs to the consensus log periodically so that long lived leases progress toward expiry in the presence of leader elections and server restarts.
@@ -605,7 +605,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.3.0...v3.4.0) and
   - `"github.com/coreos/etcd/store"` to `"go.etcd.io/etcd/etcdserver/api/v2store"`.
 - Change [snapshot file permissions](https://github.com/etcd-io/etcd/pull/9977): On Linux, the snapshot file changes from readable by all (mode 0644) to readable by the user only (mode 0600).
 - Change [`pkg/adt.IntervalTree` from `struct` to `interface`](https://github.com/etcd-io/etcd/pull/10959).
-  - See [`pkg/adt` README](https://github.com/etcd-io/etcd/tree/master/pkg/adt) and [`pkg/adt` godoc](https://godoc.org/go.etcd.io/etcd/pkg/adt).
+  - See [`pkg/adt` README](https://github.com/etcd-io/etcd/tree/main/pkg/adt) and [`pkg/adt` godoc](https://godoc.org/go.etcd.io/etcd/pkg/adt).
 - Release branch `/version` defines version `3.4.x-pre`, instead of `3.4.y+git`.
   - Use `3.4.5-pre`, instead of `3.4.4+git`.
 
@@ -875,9 +875,9 @@ Note: **v3.5 will deprecate `etcd --log-package-levels` flag for `capnslog`**; `
 ### Package `pkg/adt`
 
 - Change [`pkg/adt.IntervalTree` from `struct` to `interface`](https://github.com/etcd-io/etcd/pull/10959).
-  - See [`pkg/adt` README](https://github.com/etcd-io/etcd/tree/master/pkg/adt) and [`pkg/adt` godoc](https://godoc.org/go.etcd.io/etcd/pkg/adt).
+  - See [`pkg/adt` README](https://github.com/etcd-io/etcd/tree/main/pkg/adt) and [`pkg/adt` godoc](https://godoc.org/go.etcd.io/etcd/pkg/adt).
 - Improve [`pkg/adt.IntervalTree` test coverage](https://github.com/etcd-io/etcd/pull/10959).
-  - See [`pkg/adt` README](https://github.com/etcd-io/etcd/tree/master/pkg/adt) and [`pkg/adt` godoc](https://godoc.org/go.etcd.io/etcd/pkg/adt).
+  - See [`pkg/adt` README](https://github.com/etcd-io/etcd/tree/main/pkg/adt) and [`pkg/adt` godoc](https://godoc.org/go.etcd.io/etcd/pkg/adt).
 - Fix [Red-Black tree to maintain black-height property](https://github.com/etcd-io/etcd/pull/10978).
   - Previously, delete operation violates [black-height property](https://github.com/etcd-io/etcd/issues/10965).