Implemented creation of socket pair (RTP/RTCP).
Implemented creation of socket pair (RTP/RTCP).

RTCP socket is created next to RTP. It's reasonable to create RTCP socket even in case RTCP isn't used to avoid sending ICMP packets to remote peer.

git-svn-id: e63e81c28924109395458d2e820da944abad9487@1271 f001bc3a-424a-0410-80a0-a715b8f413a8

nuecho/telephony-unimrcp,nuecho/telephony-unimrcp,nuecho/telephony-unimrcp