openfire service: more informative assertion failure message

Explain why the assertion fails; the user already knows that it *has*
failed.

Changed files
+1 -1
nixos
modules
services
networking
+1 -1
nixos/modules/services/networking/openfire.nix
···
assertions = singleton
{ assertion = !(config.services.openfire.usePostgreSQL -> config.services.postgresql.enable);
-
message = "OpenFire assertion failed.";
};
systemd.services.openfire = {
···
assertions = singleton
{ assertion = !(config.services.openfire.usePostgreSQL -> config.services.postgresql.enable);
+
message = "OpenFire configured to use PostgreSQL but services.postgresql.enable is not enabled.";
};
systemd.services.openfire = {