Stop on first test failure to minimize logs.

.github/configs

@@ -15,6 +15,8 @@ LTESTS=""
 SKIP_LTESTS=""
 SUDO=sudo	# run with sudo by default
 TEST_SSH_UNSAFE_PERMISSIONS=1
+# Stop on first test failure to minimize logs
+TEST_SSH_FAIL_FATAL=yes
 
 CONFIGFLAGS=""
 LIBCRYPTOFLAGS=""
@@ -197,4 +199,5 @@ if [ -x "$(which plink 2>/dev/null)" ]; then
 	export REGRESS_INTEROP_PUTTY
 fi
 
-export CC CFLAGS LTESTS SUDO TEST_TARGET TEST_SSH_UNSAFE_PERMISSIONS
+export CC CFLAGS LTESTS SUDO
+export TEST_TARGET TEST_SSH_UNSAFE_PERMISSIONS TEST_SSH_FAIL_FATAL