Add type checking
Consisten variable names for enabling / disabling ssl
Let the user override the defaults from the param class
Small bugfixes
Add the config_file parameter to the channel, oper and server types.
As defined types are always local scope, we can not access the values of
the param class directly. Using a parameter and getvar to get the default
based on the global config_file variable of the main ngircd class, we should
get a working, yet flexible, solution. For this to work we have to include the
main ngircd class because the primary concat resource is defined there.