fix: check if config value is empty; empty config values are handled as if not set
fix: check if config value is empty; empty config values are handled as
if not set

CountOrlok/cforum,MatthiasApsel/cforum,MatthiasApsel/cforum,CountOrlok/cforum,CountOrlok/cforum,MatthiasApsel/cforum,ckruse/cforum,MatthiasApsel/cforum,CountOrlok/cforum,ckruse/cforum,ckruse/cforum,ckruse/cforum