Let's see if badges work on sr.ht

Correct version number in Changes

Correct IO::Socket::Async::SSL dependency version

Fix module name in META6.json

Implement backlog parameter

It simply forwards to IO::Socket::Async::SSL. I think this closes the
last gap for drop-in compatibility with IO::Socket::INET.

Correct version of IO::Socket::Async::SSL dep

That version isn't released yet, but once it is, it will hopefully have
the features we need. (PRs are there.)

Correct name to not have the problematic :: in it

Ref https://gist.github.com/ugexe/e93a5d28815b3d14531883dd95e2d8ac

Initial commit

A minimal test works. We'll have to see if anything else does.