Attempt to fix double-encoding in old-bugzilla HTTPS redirects

This is said to cause problems with urlencoding in the path part
(see http://stackoverflow.com/q/6520484/323407 ) but I don't think
Bugzilla uses such URLs.

Bug: T75848
Change-Id: I0ffa077a2b664a40bdf957090b0d31c5dfbad86f
Merge "Attempt to fix double-encoding in old-bugzilla HTTPS redirects" into production