Documentation of numeric values of the codes returned
Documentation of numeric values of the codes returned

This change provides documentation (in asciidoc format)
about corresponding numeric codes in sysexists.h. fixes #8

Signed-off-by: Sergio Arroutbi Braojos <384cdfe7eecd5d24e2fe9e6bb0deb8d0d4873527@redhat.com>

latchset/luksmeta,latchset/luksmeta