Test all file name cases, also lint man page

.builds/openbsd.yml

@@ -8,4 +8,4 @@ sources:
 tasks:
   - test_ogvt: |
       cd ogvt
-      go build && ./ogvt -file test/uptime.txt -sig test/uptime.txt.asc -pub test/adent.pub
+      ./run_test.sh

run_test.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+set -e
+
+mandoc -T lint ./ogvt.1
+go build
+echo "Testing detached armor: asc"
+./ogvt -file test/uptime.txt -sig test/uptime.txt.asc  -pub test/adent.pub
+echo "Testing detached non-armor: gpg"
+./ogvt -file test/uptime.txt -sig test/uptime.txt.gpg  -pub test/adent.pub
+echo "Testing detached non-armor: sig"
+./ogvt -file test/uptime.txt -sig test/uptime.txt.sig  -pub test/adent.pub