Log Message:
Update to 2.5.11.
Patches accepted back.
2004/02/10: Fabrice (version 2.5.11, tag release-2-5-11)
  - New GUI protocol 24, all times in relative-time.
  - Re-applied patch #2603
  - ./config/configure.in: select former or new implementation of sha1
      depending on the presence of byteswap.h and endian.h.
  - Applied patches #2611, #2612, #2613, #2614