Revision 1778923

Ensure that even long-lived DAV connections use up-to-date authz.

The new authz implementation makes this feasible for authz files
of up to a few MB as well as in-repository authz of any size.

This has been a user-reported problem with setups where Apache was
behind some proxy server and connected to it by a few long-lived
connections.  As a consequence, any current connection will see
authz changes immediately.  The effect to a running c/o however,
is not different from a suitable partial checkout before the change
that then gets updated with --set-depth after the authz change.

* subversion/mod_authz_svn/mod_authz_svn.c
  (get_access_conf): Always return an up-to-date authz configuration.