Revision 234

 r8745@llin:  dpavlin | 2005-11-08 21:24:32 +0100
 re-wrote creation of tar archives. gzip is now called directly from
 BackupPC_tarIncCreate. It uses multiple pipes to create .tar.gz and md5sum
 on the fly, supports MaxArchiveFileSize as maximum size of UNCOMPRESSED
 archive (to facilitate decompression on filesystems with limited file size).
 
 For that, there are two split implementations:
 - one which splits multiple files (smaller than MaxArchiveFileSize) into
   multiple tar archives
 - other which splits individual files (larger than MaxArchiveFileSize) into
   multiple tar archives (dir is named like file, and files are named as
   part number)