Merge commit '1e2df14a85f098d63b618531db733a21429d4037' * commit '1e2df14a85f098d63b618531db733a21429d4037': Handle OPTIONS requests from SIP servers.
Merge commit '1e2df14a85f098d63b618531db733a21429d4037' * commit '1e2df14a85f098d63b618531db733a21429d4037': Handle OPTIONS requests from SIP servers.