Change Details

Currently most Wikimedia wikis use protocol-relative URLs in $wgServer, which means that `wfExpandUrl` with `PROTO_RELATIVE` will expand to a protocol-relative URL. That does not make sense since we don't actually support HTTP anymore. For HTML snippets generated by some API with `PROTO_RELATIVE` (which is arguably the most correct choice for an API) and displayed on another site over an insecure connection, this will mean a performance hit (because of the extra redirect) and expose users to MITM.