cgconfigparser: Allow SUID and SGID permissions in 'fperm' and 'dperm' options.
cgconfigparser: Allow SUID and SGID permissions in 'fperm' and 'dperm' options.

libcgroup should allow SUID, SGID or sticky bit to be set either in
cgconfig.conf file or in API calls. Especially the sticky bit can be useful for
cooperation with systemd.

Signed-off-by: Jan Safranek <a7f4b96ffdd515ecef00f117294da18555749b0b@redhat.com>

rafalmiel/libcg,jrfastab/Linux-cgdcbxd,jrfastab/Linux-cgdcbxd,rafalmiel/libcg,rafalmiel/libcg,rafalmiel/libcg,jrfastab/Linux-cgdcbxd,jrfastab/Linux-cgdcbxd