skip bash tests that use multiplexing on Windows with explicit if

regress/channel-timeout.sh

@@ -77,9 +77,10 @@ if [ $r -ne 23 ]; then
 	fail "ssh failed"
 fi
 
-if config_defined DISABLE_FD_PASSING ; then
+if [ "$os" != "windows" ]; then
+	if config_defined DISABLE_FD_PASSING ; then
 		verbose "skipping multiplexing tests"
-else
+	else
 		verbose "multiplexed command timeout"
 		(cat $OBJ/sshd_proxy.orig ; echo "ChannelTimeout session:command=1") \
 			> $OBJ/sshd_proxy
@@ -114,6 +115,7 @@ else
 		test -f $OBJ/finished.2 && fail "second mux process completed"
 		test -f $OBJ/finished.3 || fail "third mux process did not complete"
 		close_mux
+	fi
 fi
 
 # Set up a "slow sftp server" that sleeps before executing the real one.