SETLINKKEY linknumber :key
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sets a key for an encrypted bouncer linkage. This is used to
establish linked connections between bouncers.
WARNING: The other link also has to set this key, or encryption
would not be possible, and further links would be refused.
After both sides set the key, one side has to RELINK the link.
Example:
/SETLINKKEY 2 :encryptionkey
See also: RELINK
