* On the phase 2 retry pass with rsync, verify the cached checksums

* On the phase 2 retry pass with rsync, verify the cached checksums
  if checksum caching is turned on.  This will catch the case of
  cached checksums being incorrectly appended to the compressed
  pool file.  Added new config parameter $Conf{RsyncCsumCacheVerifyProb}
  so that cached checksums are verified with a selectable probability.
  Also, increased File::RsyncP version number to 0.51.

* configure.pl now supports an optional batch mode.  Command-line
  options are used to specify all the information that configure.pl
  needs.  This is useful for buidling auto-install packages.
  Also, configure.pl now includes pod documentation, so you can do
  "perldoc configure.pl" to see all the command-line options.
  Suggested, tested and tweaked by Stuart Herbert for possible
  Gentoo inclusion.

* At each wakeup, clients are now queued based on how old the most
  recent backup is.  Clients with errors are queued first, with
  the oldest error times going first.  Clients with good backups
  are queued next, with the oldest backup going first.  Previously
  the clients were simply queued in alphabetic order.  Suggested
  by Tony Nelson.

* Added config parameter $Conf{PartialAgeMax} that controls whether
  partials are saved at all, and if so, whether the partial will be
  ignored at the next full backup if it is too old.

* BackupPC_tarExtract now allows empty archives without reporting
  an error.  Reported by Don Silvia.

* Removed Browse Backups link from Nav Bar in Archive Info display.
  Reported by Ralph Paßgang.

* Fixed documentation display for regular users.  Reported by Ralph Paßgang.

* Status and PC Summary now work for regular users and only show
  that user's hosts.  Server general status information only appears
  for admins.  Suggested by Ralph Paßgang.

* Moved the last three navigation-bar links (docs, FAQ and SF) to
  a new config parameter $Conf{CgiNavBarLinks}.  This allows
  these links to be locally configured.  Based on a patch
  submitted by Ralph Paßgang.

* Allow the navigation bar search box to be disabled by
  setting $Conf{CgiSearchBoxEnable} to 0.  Based on a patch
  submitted by Ralph Paßgang.

* Updates to de.pm from Ralph Paßgang.

* Made the BackupPC icon a link to the SF BackupPC project page.