wireprotoserver: make some instance attributes private
sshserver attempts to conform to a well-defined interface. The instance
attributes changed as part of this commit don't appear to be part of
that interface. So prefix them with _ to mark them as private.
Differential Revision: https://phab.mercurial-scm.org/D1988
wireprotoserver: remove sshserver.getarg()
AFAICT the last consumer of this helper method was removed by
d054cc5c7737 in 2010.
Differential Revision: https://phab.mercurial-scm.org/D1987
wireprotoserver: remove lock references
AFAICT sshserver.lock is unused. The last caller of it disappeared
in
9f6e0e7ef828 ~18 months ago as part of removing code to support
ancient wire protocol commands. Let's remove some dead code.
Differential Revision: https://phab.mercurial-scm.org/D1986