News153: describe C-Lightning-4591 bech32m support

Make Rusty famous:
ElementsProject/lightning#4591

Author: murchandamus

_posts/en/newsletters/2021-06-16-newsletter.md

@@ -110,7 +110,10 @@ BOLTs][bolts repo].*
   safegcd] and [#146][news146 safegcd].  Performance evaluations posted
   to the PR found it accelerated old block verification by about 10%.
 
-- [C-Lightning #4591][] bech32m support FIXME: Xekyo
+- [C-Lightning #4591][] adds support for parsing [bech32m][topic bech32]
+  addresses. C-Lightning will now permit a peer that has negotiated the feature
+  `option_shutdown_anysegwit` to specify any v1+ native segwit address as
+  a closing or withdrawal destination.
 
 {% include references.md %}
 {% include linkers/issues.md issues="4,21573,4591" %}

_topics/en/bech32.md

@@ -90,6 +90,9 @@ optech_mentions:
   - title: Electrum 4.1.0 adds support for bech32m
     url: /en/newsletters/2021/05/19/#electrum-4-1-0-enhances-lightning-features
 
+  - title: C-Lightning #4591 adds support for sending to bech32m addresses
+    url: /en/newsletters/2021/06/16/#c-lightning-4591
+
 ## Optional.  Same format as "primary_sources" above
 see_also:
   - title: Javascript bech32 demo decoder