am 5f93c39c: am ca3c24db: Merge "SIP: add SipErrorCode for error feedback." into gingerbread

Merge commit '5f93c39cdb2f75dda805691987ccd4e570f6cb74'

* commit '5f93c39cdb2f75dda805691987ccd4e570f6cb74':
  SIP: add SipErrorCode for error feedback.