Allow disabling bulk updates via win-tests.py and fix the parsing of the httpv2 disabling argument.
Allow disabling bulk updates via win-tests.py and fix the parsing of the
httpv2 disabling argument.

* win-tests.py
  (_usage_exit): Add help text.
  (.): Parse --disable-bulk-updates and fix parsing disable-http-v2.
  (Httpd::__init__): Add bulk_updates support.
  (Httpd::_svn_repo): Write bulk updates setting.
  (.): Update caller.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion