Make OMB work if the configured domain name does not exclusively contain lower case...

If the configured domain is mixed-case OAuth throws invalidsignature errors. The current URL is part of the signated parts; since the consumer does not pass the current URL, the service has to get it itself and add it to the other OAuth params for signature rebuilding. OAuth.php uses $_SERVER for this, however, the domain is lcased in $_SERVER. Hence we pass the complete current URL as generated by common_local_url to OAuthRequest.

diff --cc actions/finishremotesubscribe.php
Simple merge