Support svn_client_switch2().
Support svn_client_switch2().

* subversion/bindings/swig/ruby/svn/client.rb
  (Svn::Client::Context#switch): Use Svn::Client.switch2 instead
  of Svn::Client.switch.

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