Support traditional user scripts with @include/@match

[westonruter]

I found myself putting all of the behaviors needing to be applied globally into the one default.js. This caused the file to get quite messy; same goes for sites that I have multiple independent user scripts that I want to get applied. I would prefer to be able to stick traditional *.user.js files into my ~/.js directory and have their @include/@match metadata checked against the requested domain to determine whether they get concatenated in the response.

In addition to passing the domain to the local web server, perhaps the entire URL should then be passed so that user scripts can match more granularly at the path level, not just by domain.

[defunkt]

This seems like too much but I'd look at a tiny patch.