Merge pull request #8540 from vjpai/ust

Make udp_server_test pass on Mac, which does not have IP_PKTINFO as a meaningful setsockopt

src/core/lib/iomgr/port.h

@@ -90,7 +90,6 @@
 #define GRPC_POSIX_SOCKETUTILS
 #endif
 #elif defined(GPR_APPLE)
-#define GRPC_HAVE_IP_PKTINFO 1
 #define GRPC_HAVE_SO_NOSIGPIPE 1
 #define GRPC_HAVE_UNIX_SOCKET 1
 #define GRPC_MSG_IOVLEN_TYPE int
@@ -102,7 +101,6 @@
 #define GRPC_TIMER_USE_GENERIC 1
 #elif defined(GPR_FREEBSD)
 #define GRPC_HAVE_IPV6_RECVPKTINFO 1
-#define GRPC_HAVE_IP_PKTINFO 1
 #define GRPC_HAVE_SO_NOSIGPIPE 1
 #define GRPC_HAVE_UNIX_SOCKET 1
 #define GRPC_POSIX_NO_SPECIAL_WAKEUP_FD 1