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initial handshake on AF_LOCAL sockets. * fhandler.h (class fhandler_socket): Add no_getpeereid status flag. (fhandler_socket::af_local_set_no_getpeereid): New prototype. * fhandler_socket.cc (fhandler_socket::af_local_connect): Skip handshake if no_getpeereid is set. Add debug output. (fhandler_socket::af_local_accept): Likewise. (fhandler_socket::af_local_set_no_getpeereid): New function. (fhandler_socket::af_local_copy): Copy no_getpeereid. (fhandler_socket::getpeereid): Fail if no_getpeereid is set. * net.cc (cygwin_setsockopt): Add SO_PEERCRED for AF_LOCAL/SOCK_STREAM sockets. Add comment to explain why we need it. * include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
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