The following are part of every known implementation of the CVS protocol
(except obsolete, pre-1.5, versions of CVS) and it is considered
reasonable behavior to completely fail to work if you are connected with
an implementation which attempts to not support them. Requests:
A server need not implement
Repository, but in order to interoperate
with CVS 1.5 through 1.9 it must claim to implement it (in
Valid-requests). The client will not actually send the request.