In the general case, we want to disable transparent
compression, since the majority of our data transfer
is highly compressed Git pack files and we cannot
make them any smaller than they already are.
However, if there are CPU in abundance and the server
is reachable through slow networks; gits with huge
amount of refs can benefit from SSH-compression since
git does not compress the ref announcement during the
handshake.
Compression can be especially useful when Gerrit slaves
are being used for the larger clones and fetches and
the master server mostly takes small receive-packs.
To enable compression use sshd.enableCompression in
gerrit.config.
Change-Id: I7ff9efd26e746db5f1400017816984d652585008
d60e90f714