Initial CTCP ignore functionality

Initial CTCP ignore functionality

Kind of hacky solution to not break protocol.

Introduces new "type" in settingspage that causes the "Rule"
line to be interpreted as:

hostmask [CTCPCMD CTCPCMD]

for example:
* VERSION
blocks any version _request_ globally or on any configured network.
If no CTCPCMD is given, all CTCP requests will be ignored.