add the httpd_sys_content_t context to the cvmfs repository directory
ubuntu does not have selinux by default...
set aufs selinux context properly
FIX: Shell script syntax... WHO THE HELL INVENTED THIS CRAP?
Merge pull request #67 from reneme/selinux

SELinux compliance

The backend should now work with SELinux enabled.
Two things to make it work:

    - set httpd_sys_content_t as type for the cvmfs repository directories in /cvmfs/[repo name]
    - set system_u:object_r:default_t:s0 as the context for aufs mount points in /etc/fstab in order to allow access to normal users