v0.8.2.1: remove option_large_channels from channel_announcement.

This is the minimal fix for ElementsProject#3703
but since it's a compatibility break, I propose a point release.

You only need this if you're using `large-channels` (aka `wumbo`) option.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

CHANGELOG.md

@@ -5,6 +5,14 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 
+## [0.8.2.1] - 2020-05-08: "A Scalable Ethereum Blockchain"
+
+0.8.2.1 is a recommended upgrade from 0.8.2 only if you use `large-channels`.
+
+### Fixed
+
+- `large-channels` now works with Eclair. (Based on [3612](https://github.com/ElementsProject/lightning/pull/3712))
+
 ## [0.8.2] - 2020-04-30: "A Scalable Ethereum Blockchain"
 
 This release was named by @arowser.
@@ -712,6 +720,7 @@ There predate the BOLT specifications, and are only of vague historic interest:
 6. [0.5.1] - 2016-10-21
 7. [0.5.2] - 2016-11-21: "Bitcoin Savings & Trust Daily Interest II"
 
+[0.8.2.1]: https://github.com/ElementsProject/lightning/releases/tag/v0.8.2.1
 [0.8.2]: https://github.com/ElementsProject/lightning/releases/tag/v0.8.2
 [0.8.1]: https://github.com/ElementsProject/lightning/releases/tag/v0.8.1
 [0.8.0]: https://github.com/ElementsProject/lightning/releases/tag/v0.8.0

common/features.c

@@ -62,8 +62,7 @@ static const struct feature_style feature_styles[] = {
 			  [BOLT11_FEATURE] = FEATURE_REPRESENT } },
 	{ OPT_LARGE_CHANNELS,
 	  .copy_style = { [INIT_FEATURE] = FEATURE_REPRESENT,
-			  [NODE_ANNOUNCE_FEATURE] = FEATURE_REPRESENT,
-			  [CHANNEL_FEATURE] = FEATURE_REPRESENT_AS_OPTIONAL } },
+			  [NODE_ANNOUNCE_FEATURE] = FEATURE_REPRESENT } },
 #if EXPERIMENTAL_FEATURES
 	{ OPT_ONION_MESSAGES,
 	  .copy_style = { [INIT_FEATURE] = FEATURE_REPRESENT,