2.5.51: Filesystem capabilities 0.12

This *untested* patch implements filesystem capabilities. It allows to run privileged executables without the need for suid root.

Changes:
- updated to 2.5.51
- fixed deactivating fscaps at busy umount

This patch is available at:
<http://home.t-online.de/home/olaf.dietsche/linux/capability/>

Regards, Olaf.