runtime(debian): update Debian runtime files (#14849)

* Add space in template for 'commentstring'
* Add 'comments' and 'commentstring' support to debcontrol
* debversions: Move Ubuntu releases outside of standard support to unsupported
  Although trust, xenial, and bionic are not EOL yet, their standard support period has ended.

Reported-by: Riley Bruins <ribru17@gmail.com>
Co-authored-by: Riley Bruins <ribru17@gmail.com>
Signed-off-by: James McCoy <jamessan@debian.org>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/ftplugin/debcontrol.vim b/runtime/ftplugin/debcontrol.vim
index bb710e5..5b8292b 100644
--- a/runtime/ftplugin/debcontrol.vim
+++ b/runtime/ftplugin/debcontrol.vim
@@ -2,7 +2,7 @@
 " Language:     Debian control files
 " Maintainer:   Debian Vim Maintainers
 " Former Maintainer:    Pierre Habouzit <madcoder@debian.org>
-" Last Change:  2023 Jan 16
+" Last Change:  2024 May 25
 " URL:          https://salsa.debian.org/vim-team/vim-debian/blob/main/ftplugin/debcontrol.vim
 
 " Do these settings once per buffer
@@ -19,8 +19,11 @@
 endif
 setlocal textwidth=0
 
+setlocal comments=:#
+setlocal commentstring=#\ %s
+
 " Clean unloading
-let b:undo_ftplugin = 'setlocal tw< foldmethod< foldexpr< foldtext<'
+let b:undo_ftplugin = 'setlocal tw< foldmethod< foldexpr< foldtext< comments< commentstring<'
 
 " }}}1