Custom port patch for MultiSite

[djzone]

This patch enables MultiSite to be used with a custom port, what must be defined as WP_CUSTOM_PORT in wp-config.php.

Multisite custom port patch

Couldn't we use parse_url() for these things?

Yeah. ms-settings.php could stand for a scrub.

I've never been sure why custom ports are blocked in multisite. During the merge in 3.0, we tried to clean things up, but we tried not to ask "why" too often as everything would have been a rabbit hole.

We should probably review the history in MU and then work to just allow custom ports to work, without a constant.

Looks like it was hard coded in to use 80.

​http://mu.wordpress.org/forums/topic/14587

+1 Just encountered a situation where I - in a local MU setup - can't use the default port of :80/:443. Now I'm left with a core hack.

Related #15936

Scribus idea with parse_url is likely the route to go. Patch following that will

• also takes the absence of $_SERVER['HTTP_HOST'] into account and switch to $_SERVER['SERVER_NAME'] for reliability and those edge cases
• takes the domain via parse_url() and PHP_URL_PATH
• still falls back to the default wp_die()-message in case somehow couldn't get rid of the port

Patch needs more intense testing.

Ignore previous patch - added .php extension per accident

Closed in favor of #15936 as it seems to address IPv6 issues as well. Adding new patch there.

Duplicate of #15936.