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Send a MODE request when JOINing
This kind of reverts/fixes f1cb09b. Robby found a bug with evil ChanServ which goes like this: - You join an empty, but registered channel and the IRCd applies its default modes (+nt), but ZNC didn't ask for MODE, so doesn't know this. - ChanServ applies whatever channel modes it wants to apply. This causes ZNC to see a mode change (e.g. +s). The result of this is that ZNC thinks that the channel has mode +s and it will tell every client that connects to it about this. The fix is to send a MODE request when JOINing. To make sure that we don't confuse clients, we block the reply. Signed-off-by: Uli Schlachter <email@example.com>
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