upstream: verify that ChannelTimeout in a Match block is effective

OpenBSD-Regress-ID: 30770cad71ca060aaaa05e4bdd0ea8941b768c6b

regress/channel-timeout.sh

@@ -1,4 +1,4 @@
-#	$OpenBSD: channel-timeout.sh,v 1.2 2024/01/09 22:19:36 djm Exp $
+#	$OpenBSD: channel-timeout.sh,v 1.3 2026/07/21 06:18:23 djm Exp $
 #	Placed in the Public Domain.
 
 tid="channel timeout"
@@ -47,6 +47,17 @@ if [ $r -ne 255 ]; then
 	fail "ssh returned unexpected error code $r"
 fi
 
+verbose "match command timeout"
+(cat $OBJ/sshd_proxy.orig ;
+ echo "match user *" ;
+ echo "ChannelTimeout session:command=1") \
+	> $OBJ/sshd_proxy
+${SSH} -F $OBJ/ssh_proxy somehost "sleep 5 ; exit 23"
+r=$?
+if [ $r -ne 255 ]; then
+	fail "ssh returned unexpected error code $r"
+fi
+
 verbose "command long timeout"
 (cat $OBJ/sshd_proxy.orig ; echo "ChannelTimeout session:command=60") \
 	> $OBJ/sshd_proxy