virt-aa-helper: clarify command line options

While only used internally from libvirt the options still are misleading
enough to cause issues every now and then.
Group modes, options and an adding extra file and extend the wording of
the latter which had the biggest lack of clarity.
Both add a file to the end of the rules, but one re-generates the
rules from XML and the other keeps the existing rules as-is not
considering the XML content.
Reviewed-by: NCole Robinson <crobinso@redhat.com>
Acked-by: NJamie Strandboge <jamie@canonical.com>
Signed-off-by: NChristian Ehrhardt <christian.ehrhardt@canonical.com>

src/security/virt-aa-helper.c

@@ -95,18 +95,20 @@ vahDeinit(vahControl * ctl)
 static void
 vah_usage(void)
 {
-    printf(_("\n%s [options] [< def.xml]\n\n"
-            "  Options:\n"
+    printf(_("\n%s mode [options] [extra file] [< def.xml]\n\n"
+            "  Modes:\n"
             "    -a | --add                     load profile\n"
             "    -c | --create                  create profile from template\n"
-            "    -d | --dryrun                  dry run\n"
             "    -D | --delete                  unload and delete profile\n"
-            "    -f | --add-file <file>         add file to profile\n"
-            "    -F | --append-file <file>      append file to profile\n"
             "    -r | --replace                 reload profile\n"
             "    -R | --remove                  unload profile\n"
-            "    -h | --help                    this help\n"
+            "  Options:\n"
+            "    -d | --dryrun                  dry run\n"
             "    -u | --uuid <uuid>             uuid (profile name)\n"
+            "    -h | --help                    this help\n"
+            "  Extra File:\n"
+            "    -f | --add-file <file>         add file to a profile generated from XML\n"
+            "    -F | --append-file <file>      append file to an existing profile\n"
             "\n"), progname);
 
     puts(_("This command is intended to be used by libvirtd "