On the tristate-chunked-request branch:

Reduce visibility of an intermediate variable.

* subversion/libsvn_ra_serf/ra_serf.h
  (svn_ra_serf__session_t.using_chunked_requests): Remove this member.

* subversion/libsvn_ra_serf/serf.c
  (load_config): Add using_chunked_requests parameter and use it in place of
    the removed member.
  (svn_ra_serf__open): Track signature change.

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/tristate-chunked-request@1501955 13f79535-47bb-0310-9956-ffa450edef68