bshaffer/oauth2-server-php — pull request #110 by steffkes (2013-04-28 18:55:08+00:00)
Title: Change Statuscode 400 to 405 if POST-Request is required

As per http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.4.6 change the statuscode from 400 to 405 and include `Allow`-header indicating that POST must be used to grant an access token.