Force predefined list of networks?

[poVoq]

Is your feature request related to a problem? Please describe.
Right now it is only possible to either force Convos to a single IRC network or allow connecting to any network. As many networks have strict connection limits from a single IP (without requesting special permissions) this poses a certain problem if you want to allow connections to multiple networks.

Describe the solution you'd like
It would be nice to have an option to only allow connections to those that have a predefined default configuration made by an admin. This way one can ensure WEBIRC etc. is used and avoid having your IP ban-listed on some not-configured IRC networks.

Describe alternatives you've considered
Of course forcing to a single network works, but it would be nicer if limited pre-configured connections to some other networks were possible.