[BUG] Group start time and sequences are not properly set

[maxsharabayko]

When a group connection is established on a listening socket, the group start time is not properly set. This results, in particular, in a wrong Timestamp in SRT stats takes from a group.

Is looks like the following variables are not set with the first connection established:

• m_tsStartTime
• m_tsRcvPeerStartTime
• m_iLastSchedSeqNo
• m_iLastSchedMsgNo
• m_RcvBaseSeqNo

See CUDT::makeMePeerOf(..) function call. The CUDT::synchronizeWithGroup(..) is nevercalled for a listener accepting a group connection, even for the second one.

To reproduce:

(improper group initialization here)
srt-xtransmit receive "srt://:4200?groupconnect=1" "srt://:5200?groupconnect=1"

srt-xtransmit generate srt://127.0.0.1:4200 srt://127.0.0.1:5200 --sendrate 5Mbps