test: new test, verifies .conf option secure_mode

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

test/Makefile.am

@@ -1,6 +1,6 @@
 EXTRA_DIST       = lib.sh opts.sh
 EXTRA_DIST      += api.sh local.sh unicode.sh remote.sh fwd.sh mark.sh \
-		   facility.sh notify.sh rotate_all.sh
+		   facility.sh notify.sh rotate_all.sh secure.sh
 CLEANFILES       = *~ *.trs *.log
 TEST_EXTENSIONS  = .sh
 TESTS_ENVIRONMENT= unshare -mrun
@@ -21,5 +21,6 @@ TESTS           += fwd.sh
 TESTS           += mark.sh
 TESTS           += notify.sh
 TESTS           += rotate_all.sh
+TESTS           += secure.sh
 
 programs: $(check_PROGRAMS)