RFC 3986 indicates that ; is not encoded as part of the URI, as is the case
with other members of sub-delim. Changed encodeUriSegment to match that
behaviour, along with the corresponding spec.

Change location to retain the expected path encoding. The decode/encode cycle
for the location path loses data as %3B (a semi-colon in the path) and ; (a
sub-delim in the URI for path parameters) are considered to be different.