Release 0.6.3

Documentation: lego 5's commands beside lego 4's, and lego on a host
inside a split DNS (its propagation check and the ways round it).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -202,7 +202,8 @@ review step.
 
 ## Status
 
-Version 0.6.2 is the current release. It adds a `certificates` role
+Version 0.6.3 is the current release. It brings the lego docs up to
+lego 5 and explains lego with split DNS. 0.6.2 added a `certificates` role
 for tokens that get certificates for other hosts. 0.6.1 gets certificates onto your
 other hosts (`jarl cert get`: Jarl obtains and renews them, a host downloads them and runs a
 hook, a daily timer keeps them current), exports certificates, fixes