Merge commit '8d9e8de2c920e8c9dc2da33410780ec739076bb9' * commit '8d9e8de2c920e8c9dc2da33410780ec739076bb9': SipService: send SERVER_ERROR if server doesn't provide nonce
Merge commit '8d9e8de2c920e8c9dc2da33410780ec739076bb9' * commit '8d9e8de2c920e8c9dc2da33410780ec739076bb9': SipService: send SERVER_ERROR if server doesn't provide nonce