trdp-md-test: test using big messages by default
fix typo in posix/vos_sock.c
Adapted error handling for errors reading UDP MD
No error message for UDP if header read with size == 0 and VOS_NO_ERR
updated fix for #224
TCP is now checking for valid header
Using VOS_INVALID_SOCKET, TRDP_INVALID_SOCKET_INDEX
Changes due to Lint warnings
TRDP_INVALID_SOCKET_INDEX introduced