feature: git matcher routes

[joeworkman]

A clear and concise description of what you want the system to do.

It would be good to be able to define a matcher route instead of defining an explicit route.

What are the Caddyfile directives that need to be added.

Current:

route /update {
    git update repo aspecthq.com
}

Requested:

git /update update repo aspecthq.com

[greenpau]

@joeworkman , please see "routeless" config example.

caddy-git/assets/config/routeless/Caddyfile

Lines 23 to 28 in b15e3b5

	127.0.0.1, localhost {
	respond /version* "1.0.0" 200
	git /update/authp.github.io update repo authp.github.io
	root * {$HOME}/tmp/authp/gitcfg/authp.github.io
	file_server
	}

FYI, will release this weekend.