tests/test-gendoc-sv.t

wireproto: make version 2 @wireprotocommand an independent function

Previously, the code for this decorator was shared between version 1
and version 2 commands. Very few parts of the function were identical.
So I don't think sharing is justified.

wireprotov2server now has its own @wireprotocommand decorator function.
Because the decorator is no longer shared, code for configuring the
transport policy has been removed. i.e. commands must have separate
implementations for each wire protocol version.

Differential Revision: https://phab.mercurial-scm.org/D3395

#require docutils gettext

  $ $TESTDIR/check-gendoc sv
  checking for parse errors