core: make network.channels and channel keys private by default. Otherwise these can reveal secret information.
core: make network.channels and channel keys private by default. Otherwise these can reveal secret information.

Signed-off-by: James McCoy <91ae71a1168cea0b65ac9975da69d5a7753116be@users.sourceforge.net>

Ban3/Limnoria,haxwithaxe/supybot,frumiousbandersnatch/supybot-code,ProgVal/Limnoria-test,Ban3/Limnoria,buildbot/supybot,jeffmahoney/supybot,ProgVal/Limnoria-test