gmid would disallow the '@' and ':' characters in paths (unless percent-encoded.) Issue reported by freezr.

Some particularly crafted IRIs can cause a denial of service (DOS). IRIs which have a trailing `..' segment and resolve to a valid IRI (i.e. a .. that's not escaping the root directory) will make the server process loop forever. This is """just""" an DOS vulnerability, it doesn't expose anything sensitive or give an attacker anything else.

ensure non-encoded and pct-encoded hostnames are parsed correctly