The man page for ssh discusses Compression, and says it can be set in the configuration file. Yet for some reason, the supplied default sshd_config file is where # Compression yes is displayed, as if it were a parameter to be set for sshd instead of ssh.
It is a parameter that can be set for sshd. Read "man sshd_config", search for Compression.
Change all RESOLVED bug to CLOSED with the exception of the ones fixed post-4.4.