Added MSG_PEEK to the allowed flags check in isotp_recvmsg function #52
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To be able to get the size of the buffer to allocate for the next message without removing the message from the receive queue, the caller needs to be able to set the
flagstoMSG_PEEK | MSG_TRUNC.This patch restores the ability of the caller to set the
MSG_PEEKflag in a call to recv which was accidentally removed while adding support for theMSG_TRUNCflag in this commit.