Revert "MSG_EOR is not supported on MacOS even if defined"

This reverts commit 52871d8.

Author: mvorisek

ext/sockets/sockets.c

@@ -482,7 +482,7 @@ static PHP_MINIT_FUNCTION(sockets)
 	REGISTER_LONG_CONSTANT("MSG_TRUNC",		MSG_TRUNC,		CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("MSG_PEEK",		MSG_PEEK,		CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("MSG_DONTROUTE", MSG_DONTROUTE,	CONST_CS | CONST_PERSISTENT);
-#if defined(MSG_EOR) && !defined(__APPLE__)
+#ifdef MSG_EOR
 	REGISTER_LONG_CONSTANT("MSG_EOR",		MSG_EOR,		CONST_CS | CONST_PERSISTENT);
 #endif
 #ifdef MSG_EOF