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Description
from @progval :
>>> mode #nonexistent +o second
:testnet.ergo.chat 403 second #nonexistent :No such channel
>>> mode #secret +o second
:testnet.ergo.chat 482 second #secret :You're not a channel operator
This distinction leaks the existence of the secret channel. This is not a very big deal since you can always find out whether a secret channel exists by trying to JOIN it. Technically, this is silent whereas a successful JOIN notifies the occupants; however, failure to JOIN a secret channel that is also protected by +k or +i (which would be typical of channels that are actually sensitive) would also be silent.