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f5c37c8cbb
MSG_PEEK on TCP sockets was broken since commit b71d4477eab7c19c34e57e5c9a1f8add63de7879 from 06.03.2017: recv hung in an endless loop and tcp_recved() was called for peeked data (which would result in a too large window advertised). Aded TCP MSG_PEEK to socket unit tests