Added comment regarding observed indefinite block in js_socket_recv().

src/sbbs3/js_socket.c

@@ -112,7 +112,7 @@ static ptrdiff_t js_socket_recv(private_t *p, void *buf, size_t len, int flags,
 	int	copied,ret;
 	
 	if(p->session==-1)
-		return(recv(p->sock, buf, len, flags));
+		return(recv(p->sock, buf, len, flags));	/* Blocked here, indefinitely, in MSP-UDP service */
 	if(p->nonblocking) {
 		do_cryptAttribute(p->session, CRYPT_OPTION_NET_READTIMEOUT, 0);
 	}