Bugfix.

* libmu_cfg/tls.c (cb2_safety_checks): Fix handling of "all" and "none".
* maidag/maidag.c (cb2_forward_file_checks): Likewise.
* maidag/forward.c (maidag_forward): Handle MU_ERR_EXISTS return properly.

@@ -64,9 +64,15 @@ cb2_safety_checks (const char *name, void *data)
     name++;
 
   if (strcmp (name, "none") == 0)
-    val = MU_FILE_SAFETY_NONE;
+    {
+      *res = negate ? MU_FILE_SAFETY_ALL : MU_FILE_SAFETY_NONE;
+      return 0;
+    }
   else if (strcmp (name, "all") == 0)
-    val = MU_FILE_SAFETY_ALL;
+    {
+      *res = negate ? MU_FILE_SAFETY_NONE : MU_FILE_SAFETY_ALL;
+      return 0;
+    }
   else if (strcmp (name, "default") == 0)
     {
       if (data == &tls_settings.ssl_key)

@@ -213,10 +213,10 @@ maidag_forward (mu_message_t msg, struct mu_auth_data *auth, char *fwfile)
     mu_list_create (&idlist);
 
   rc = mu_file_safety_check (filename, forward_file_checks,
-				  auth, idlist);
+			     auth, idlist);
   if (rc == 0)
     result = process_forward (msg, filename, auth->name);
-  else if (rc)
+  else if (rc == MU_ERR_EXISTS)
     mu_diag_output (MU_DIAG_NOTICE,
 		    _("skipping forward file %s: already processed"),
 		    filename);

@@ -348,9 +348,15 @@ cb2_forward_file_checks (const char *name, void *data)
     name++;
 
   if (strcmp (name, "none") == 0)
-    forward_file_checks = MU_FILE_SAFETY_NONE;
+    {
+      forward_file_checks = negate ? MU_FILE_SAFETY_ALL : MU_FILE_SAFETY_NONE;
+      return 0;
+    }
   else if (strcmp (name, "all") == 0)
-    forward_file_checks = MU_FILE_SAFETY_ALL;
+    {
+      forward_file_checks = negate ? MU_FILE_SAFETY_NONE : MU_FILE_SAFETY_ALL;
+      return 0;
+    }
   else if (strcmp (name, "default") == 0)
     forward_file_checks = FORWARD_FILE_PERM_CHECK;
   else if (mu_file_safety_name_to_code (name, &val))