Log Message:
Version 1.9.0

User-visible changes:
- General:
  * make all commands provide brief description in help output (r1522518)
  * flush stdout before exiting to avoid information being lost (r1543868)

- Major new features:
  * fsfs: new format 7 with more efficient on-disk layout (r1547045 et al)
  * resolve: improve interactive conflict resolution menus
  * blame: support showing prospective as well as previous changes
  * info: support printing of individual values with --show-item (r1662620)
  * svn auth: new subcommand to manage cached credentials and certs
  * svnserve: cache config and authz to lower resource usage and be able to
    serve large numbers of connections with a limited number of threads
  * membuffer: quadruple the maximum cacheable directory size (r1545948 et al)
  * new filesystem fsx (faster, smaller); experimental - see release notes

- Minor new features and improvements:
See http://svn.apache.org/repos/asf/subversion/tags/1.9.0/CHANGES