Simplify and cleanup.

Simplify and cleanup.

* uri_pickup(): Cleanup. Unset normalize-related feature into uri_pickup_normalize(). Remove unused removing cuhnks.
* uri_pickup_normalize(): Simplify. Renamed from uri_array_normalize(). Collect all normalize-related feature.
* uri_pickup_implode(): Renamed from uri_array_implode().
* scheme_normalize(): Simplify
* port_normalize(): More strict about port conversion
* path_normalize(): Cleanup, soften to read. string-divider safe
* file_normalize(): Treat Apache 2 language/charset/encoding suffixes ('index.en.ja.html.gz' => '')