Merge options virtualAccountAliases and virtualDomainAliases into virtualAliases

tests/aliases.nix

@@ -42,10 +42,10 @@ in
           fqdn = "mail.example.com";
           domains = ["example.com" "aliased.com" "otherdomain.com"];
           accounts = mkAccounts accounts;
-          virtualDomainAliases = {
+          virtualAliases = {
+            # domain aliases
             "aliased.com" = "example.com";
-          };
-          virtualAccountAliases = {
+            # account aliases
             "alias@example.com" = accounts."alias".address;
             "multi-alias@example.com" = lib.map (x: accounts.${x}.address) ["multi-alias1" "multi-alias2"];
             "@example.com" = accounts."catchall".address;