Make deny channel { } support escaped sequences like channel "#xyz\*";

Make deny channel { } support escaped sequences like channel "#xyz\*";
This so you can match a literal * or ? via \* and \?

And do the same for allow channel { }.

This can break current configs if you have a deny channel for a channel
with a slash in it, since a \ which already sortof needed to be \\ in
the config file, now needs to be \\\\ (doesn't that look great?).
Fortunately slashes are not really common in channel names, let alone
deny channel { } configuration.