Proposal: Deprecate Some File Extensions

[l-zeuch]

Description

Currently, we support a plethora of file extensions, namely the
following:

yagpdb.vim/ftdetect/yagpdbcc.vim

Lines 31 to 38 in 83f3fae

	" Detect our 'own' extensions, which are usually used by a
	" vast majority of the userbase.
	au BufRead,BufNewFile *.yag setfiletype yagpdbcc
	au BufRead,BufNewFile *.yagpdb setfiletype yagpdbcc
	au BufRead,BufNewFile *.yagcc setfiletype yagpdbcc
	au BufRead,BufNewFile *.yag-cc setfiletype yagpdbcc
	au BufRead,BufNewFile *.yagpdbcc setfiletype yagpdbcc
	au BufRead,BufNewFile *.yagpdb-cc setfiletype yagpdbcc

This is certainly a lot, and potentially way too much. There are also
some potential issues with a hyphenated file extension (just a gut
feeling, I haven't tested it) — moreover, long file extensions are just
really weird.

Solution

I propose we drop support for yagpdb, yagpdbcc, yag-cc, and
yagpdb-cc in favour of just yag and maybe yagcc. The option to
override tmpl and go.tmpl should be kept, though, as
yagpdb-cc/yagpdb-cc uses the latter one (for whatever reason, Joe
doesn't remember why).

Obviously this will be a breaking change, and thus needs proper
announcement, at the very least inside the commit message. Keeping this
issue open for a while will also help with that.

Code of Conduct

• I agree to follow this project's Code of Conduct.

[l-zeuch]

For the record, I've implemented the proposed changes in #80.

If there are any comments on this proposal, please post them here, not on the PR.

[LRitzdorf]

Sounds good to me! I do agree that having so many supported extensions is a bit weird.