#2364 fix, pushing to try changes in private repo

.github/actions/go-test-setup/action.yml

@@ -1,7 +1,7 @@
 runs:
   using: "composite"
   steps:
-    - name: increase the UDP receive buffer size # see https://github.com/lucas-clemente/quic-go/wiki/UDP-Receive-Buffer-Size
+    - name: increase the UDP receive buffer size # see https://github.com/quic-go/quic-go/wiki/UDP-Buffer-Sizes
       shell: bash
       run: sysctl -w net.core.rmem_max=2500000
       if: ${{ matrix.os == 'ubuntu' }}

.github/actions/markdown-link-check/action.yml

@@ -0,0 +1,20 @@
+name: Markdown Links Check
+
+on:
+    push: [master]
+    pull_request: [master]
+    schedule:
+      # runs once in a couple of days at 9am
+      - cron: '0 9 */2 * *'
+
+jobs:
+  check-links:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - uses: gaurav-nelson/github-action-markdown-link-check@v1
+        with:
+          use-quiet-mode: 'yes'
+          use-verbose-mode: 'yes'
+          # for removing any false positives
+          config-file: .github/workflows/markdown-links-config.json

.github/workflows/markdown-links-config.json

@@ -0,0 +1,7 @@
+{
+  "ignorePatterns": [
+    {
+      "pattern": "^https://github.com/libp2p/go-libp2p/issues/"
+    }
+  ]
+}