Have openssl_accept return 0 if fd_toggle_blocking failed.

sockets.c

@@ -301,6 +301,7 @@ int openssl_accept(int fd, struct client *clients, struct ircdstate *ircdstate,
     if (!fd_toggle_blocking(clients[clientindex].fd, 1)) {
       debugprint(DEBUG_CRIT, "fd_toggle_blocking off failed for fd %d: %s.\n", clients[clientindex].fd, strerror(errno));
       disconnectclient(clients[clientindex].fd, clients, ircdstate, settings, clientcodes);
+      return 0;
     }
     // And mark as no longer pending SSL_accept()
     clients[clientindex].pendingsslaccept = 0;