Patch to add XML output for 'svn info'

* subversion/clients/cmdline/main.c
  (svn_cl__cmd_table[]): added --xml and --incremental options
  for svn info

* subversion/clients/cmdline/dtd/info.dtd
  New dtd for info --xml

* subversion/clients/cmdline/info-cmd.c
  (print_header_xml): New function to print XML header
  (print_target_xml): New function to print open and close targets
  (print_footer_xml): New function to print XML footer
  (print_info_xml): New function for XML output
  (info_receiver): Edited existing callback to call function to
   print xml or traditional output depending on cmdline option
  (svn_cl__info): Modified for XML output and redirected errors to stderr

* tools/client-side/bash_completion
  (_svn): added "--incremental" and "--xml" options to "info"
  for auto-completion.