runtime(netrw): change netrw maintainer

Dr. Chip retired some time ago and is no longer maintaining the netrw
plugin. However as a runtime plugin distributed by Vim, it important to
maintain the netrw plugin in the future and fix bugs as they are
reported.

So, split out the netrw plugin as an additional package, however include
some stubs to make sure the plugin is still loaded by default and the
documentation is accessible as well.

closes: #16368

Signed-off-by: Luca Saccarola <github.e41mv@aleeas.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

runtime/pack/dist/opt/netrw/autoload/netrw_gitignore.vim

@@ -0,0 +1,26 @@
+" Maintainer: Luca Saccarola <github.e41mv@aleeas.com>
+" Former Maintainer: Bruno Sutic
+" Upstream: <https://github.com/saccarosium/netrw.vim>
+
+" netrw_gitignore#Hide: gitignore-based hiding
+"  Function returns a string of comma separated patterns convenient for
+"  assignment to `g:netrw_list_hide` option.
+"  Function can take additional filenames as arguments, example:
+"  netrw_gitignore#Hide('custom_gitignore1', 'custom_gitignore2')
+"
+" Usage examples:
+"  let g:netrw_list_hide = netrw_gitignore#Hide()
+"  let g:netrw_list_hide = netrw_gitignore#Hide() . 'more,hide,patterns'
+"
+" Copyright:    Copyright (C) 2013 Bruno Sutic {{{1
+"               Permission is hereby granted to use and distribute this code,
+"               with or without modifications, provided that this copyright
+"               notice is copied with it. Like anything else that's free,
+"               netrw_gitignore.vim is provided *as is* and comes with no
+"               warranty of any kind, either expressed or implied. By using
+"               this plugin, you agree that in no event will the copyright
+"               holder be liable for any damages resulting from the use
+"               of this software.
+function! netrw_gitignore#Hide(...)
+  return substitute(substitute(system('git ls-files --other --ignored --exclude-standard --directory'), '\n', ',', 'g'), ',$', '', '')
+endfunction