wildcard matchers

lib/gat/gatcaddyfile/gattype.go

lib/gat/gatcaddyfile/matcher.go

lib/gat/matchers/database.go

lib/gat/matchers/startupparameter.go

lib/gat/matchers/user.go

lib/util/strutil/matcher.go

lib/util/strutil/matcher_test.go

presets/digitalocean_databases.Caddyfile