Kevin Easton 686344314f Unsetting CMDCHARS sets it back to the default ...

Previously you could unset CMDCHARS and the effect would be to treat it like it was set to DEFAULT_CMDCHARS,
except that some code was missing the fallback (eg. ignore_last_nick()) which would make it crash.

Instead of having the fallback everywhere, just make it so that you can't unset the variable - if you try, it
sets it to DEFAULT_CMDCHARS.  This reflects what the behaviour has always been, it just makes it explicit to
the user and the bonus is we don't have the test it for NULL everywhere.

2017-02-16 23:42:52 +11:00

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