MFH: Fixed bug #46360 (TCP_NODELAY constant for socket_{get,set}_option)

[DOC] Added TCP_NODELAY constant to sockets extension, to be used with
socket_set_option() to disable TCP's Nagle algorithm. Avail in PHP>=5.2.7.

ext/sockets/sockets.c

@@ -509,6 +509,9 @@ PHP_MINIT_FUNCTION(sockets)
 	REGISTER_LONG_CONSTANT("SO_ERROR",		SO_ERROR,		CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("SOL_SOCKET",	SOL_SOCKET,		CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("SOMAXCONN",		SOMAXCONN,		CONST_CS | CONST_PERSISTENT);
+#ifdef TCP_NODELAY
+	REGISTER_LONG_CONSTANT("TCP_NODELAY",   TCP_NODELAY,    CONST_CS | CONST_PERSISTENT);
+#endif
 	REGISTER_LONG_CONSTANT("PHP_NORMAL_READ", PHP_NORMAL_READ, CONST_CS | CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("PHP_BINARY_READ", PHP_BINARY_READ, CONST_CS | CONST_PERSISTENT);