(bug 31040) Fixed $wgSecureLogin effect on returnto.

(bug 31040) Fixed $wgSecureLogin effect on returnto.

Added parameter to Title::getFullURL to allow specification
of a protocol rather than assuming PROTO_RELATIVE. Also
added an accompanying parameter to Skin::makeSpecialUrl
to make a link for a specific protocol.

Cleaned up the creation of personal URLs in SkinTemplate.php
so that when $wgSecureLogin is enabled, the returnto
query is not lost in the process.

Note: This will only work if $wgServer is set to a
protocol relative URL.

Change-Id: Iba48eb3620fb3a721220364185f7abfd902412d0
Signed-off-by: Tyler Romeo <tylerromeo@gmail.com>