cgconfig: unify the help output
cgconfig: unify the help output

Remove cgconfig input free row and change the output program name to standardize
the output with the other libcgroup tools.
sort options based on alphabetical order

Signed-off-by: Ivana Hutarova Varekova <2e3918a0a366ea7e658a2062ab582c898a7e1b1b@redhat.com>
Acked-by: Dhaval Giani <f48451d72a1ad74c777093928b661ad7099a85df@gmail.com>
Acked-by: Jan Safranek <a7f4b96ffdd515ecef00f117294da18555749b0b@redhat.com>

rafalmiel/libcg,rafalmiel/libcg,rafalmiel/libcg,rafalmiel/libcg