* Removed default paths from conf/config.pl so configure.pl will

* Removed default paths from conf/config.pl so configure.pl will
  determine the correct ones at install time.  Avoids problem of
  the config editor complaining about bad executable paths the
  first time you use it.

* Changed first byte of compressed files with rsync checksums appended
  to 0xd7 to allow correct protocol_version >= 27 md4 checksums to be
  written.  Old cached checksum files have a first byte 0xd6 and are
  now considered to be uncached.  They will be automatically updated
  as needed.

* BackupPC_tarPCCopy now handles all file types correctly.  Reported
  by George Avrunin.

* Fixes for rsync restore where hardlink is to file outside of the
  top-level restore directory.  Reported by George Avrunin, who helped
  with debugging.

* Fixes for checksum mismatch on restore for certain file sizes.
  Reported by George Avrunin and others.