File openssh-7.7p1-X_forward_with_disabled_ipv6.patch of Package openssh

# HG changeset patch
# Parent  44592f09f090e74432f608084069d30d808fda69
Do not throw away already open sockets for X11 forwarding if another socket
family is not available for bind()

Index: openssh-8.8p1/channels.c
===================================================================
--- openssh-8.8p1.orig/channels.c
+++ openssh-8.8p1/channels.c
@@ -4607,6 +4607,13 @@ x11_create_display_inet(struct ssh *ssh,
 				debug2_f("bind port %d: %.100s", port,
 				    strerror(errno));
 				close(sock);
+				/* do not remove successfully opened sockets if
+				 * the request failed because the protocol
+				 * IPv4/6 is not available (e.g. IPv6 may be
+				 * disabled while being supported)
+				 */
+				if (EADDRNOTAVAIL == errno)
+					continue;
 				for (n = 0; n < num_socks; n++)
 					close(socks[n]);
 				num_socks = 0;