raise ssh background traffic priority to af11

The default cs1 is resulting traffic being completely dropped for some
routes with congestion.

ssh/ssh_config

@@ -1,6 +1,8 @@
 # Include drop-in configurations
 Include /etc/ssh/ssh_config.d/*.conf
 
+IPQoS af21 af11
+
 ServerAliveInterval 60
 ServerAliveCountMax 10
 TCPKeepAlive no

ssh/sshd_config

@@ -16,6 +16,8 @@ Include /etc/ssh/sshd_config.d/*.conf
 #ListenAddress 0.0.0.0
 #ListenAddress ::
 
+IPQoS af21 af11
+
 HostKey /etc/ssh/ssh_host_ed25519_key
 HostKeyAlgorithms ssh-ed25519
 KexAlgorithms sntrup761x25519-sha512@openssh.com