* fileserver: Fix try_files for directories, windows fix
* fileserver: Add new file type placeholder, refactoring, tests
* fileserver: Review cleanup
* fileserver: Flip the return args order
* matcher: Add `split_path` option to file matcher; used in php_fastcgi
* matcher: Skip try_files split if not the final part of the filename
* matcher: Add MatchFile tests
* matcher: Clarify SplitPath godoc