Logging messages

There are event log messages when a new key is generated and zeroized for the server:

ssh: New <num-bits> -bit [rsa|dsa] SSH host key installed

ssh: New SSH host key zeroized

There are also messages that indicate when a client public key is installed or removed:

ssh: <num-bits> -bit [rsa|dsa] client public key [installed|removed] ([manager|operator]access)(key_comment)

Only up to 39 characters of the key comment are included in the event log message.