quota: Mark noenforcing quotas with unlimited quota

This allows quota to be properly updated for unenforced quotas
so they can be used for tracking only.

This fixes issue where using noenforcing would not update quota
during mail save, but requires a manual quota update.

src/plugins/quota/quota.c

@@ -935,12 +935,15 @@ int quota_transaction_set_limits(struct quota_transaction_context *ctx,
 	roots = array_get(&ctx->quota->roots, &count);
 	for (i = 0; i < count; i++) {
 		if (!quota_root_is_visible(roots[i], ctx->box) ||
-		    roots[i]->no_enforcing)
+		    (roots[i]->no_enforcing && ctx->auto_updating))
 			continue;
-
-		if (quota_root_get_rule_limits(roots[i], mailbox_name,
-					       &bytes_limit, &count_limit,
-					       &ignored, &error) < 0) {
+		else if (roots[i]->no_enforcing) {
+			bytes_limit = (uint64_t)-1;
+			count_limit = (uint64_t)-1;
+			ignored = FALSE;
+		} else if (quota_root_get_rule_limits(roots[i], mailbox_name,
+						      &bytes_limit, &count_limit,
+						      &ignored, &error) < 0) {
 			ctx->failed = TRUE;
 			*error_result_r = QUOTA_GET_RESULT_INTERNAL_ERROR;
 			*error_r = t_strdup_printf(
@@ -955,7 +958,10 @@ int quota_transaction_set_limits(struct quota_transaction_context *ctx,
 			ret = quota_get_resource(roots[i], mailbox_name,
 						 QUOTA_NAME_STORAGE_BYTES,
 						 &current, &limit, &error);
-			if (ret == QUOTA_GET_RESULT_LIMITED) {
+			if (roots[i]->no_enforcing) {
+				ctx->bytes_ceil = (uint64_t)-1;
+				ctx->bytes_ceil2 = (uint64_t)-1;
+			} else if (ret == QUOTA_GET_RESULT_LIMITED) {
 				if (limit <= current) {
 					/* over quota */
 					ctx->bytes_ceil = 0;
@@ -987,7 +993,9 @@ int quota_transaction_set_limits(struct quota_transaction_context *ctx,
 			ret = quota_get_resource(roots[i], mailbox_name,
 						 QUOTA_NAME_MESSAGES,
 						 &current, &limit, &error);
-			if (ret == QUOTA_GET_RESULT_LIMITED) {
+			if (roots[i]->no_enforcing) {
+				ctx->count_ceil = (uint64_t)-1;
+			} else if (ret == QUOTA_GET_RESULT_LIMITED) {
 				if (limit <= current) {
 					/* over quota */
 					ctx->count_ceil = 0;