git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/serf_error_callbacks@1931112 13f79535-47bb-0310-9956-ffa450edef68

Add a...

* BRANCH-README



git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/serf_error_callbacks@1931113 13f79535-47bb-0310-9956-ffa450edef68

Catchup merge with trunk @1931200


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/serf_error_callbacks@1931201 13f79535-47bb-0310-9956-ffa450edef68

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/serf_error_callbacks@1931267 13f79535-47bb-0310-9956-ffa450edef68

using a context callback with our session as the baton. Assumes that
we use one Serf context per ra_serf session, which is currently true.

[in subversion/libsvn_ra_serf]
* ra_serf.h
  (svn_ra_serf__session_t::serf_error): New member.
  (svn_ra_serf__wrap_err_stack): New prototype and debug-mode macro.
* serf.c
  (sess_error_callback): New; the Serf error callback.
  (svn_ra_serf__open, ra_serf_dup_session): Register the callback when
   the Serf context is created.
* util.c: Optionally include serf_bucket_util.h; it declares the required
   prototype for serf_default_readline().
  (conn_setup): When a new Serf SSL context was created, tell it to use
   our session's error callback.
  (svn_ra_serf__context_run): Report errors collected from Serf.
  (bucket_limited_readline): Put this function in a conditional block,
   otherwise we get a warning about an unused function when experimental
   Serf features are turned on.
* util_error.c: Include stdarg.h.
  (format_error_message): New; hoist error mesage formatting from
   svn_ra_serf__wrap_err().
  (svn_ra_serf__wrap_err): Delegate to format_error_message().
  (svn_ra_serf__wrap_err_stack): Implement, using format_error_message().


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/serf_error_callbacks@1931269 13f79535-47bb-0310-9956-ffa450edef68