TOOLS: Add comments on functions in colondb The colondb API provides three function: * sss_colondb_open() * sss_colondb_write_field() * sss_colondb_read_field() It is not obvious that sss_colondb_open() add destructor on talloc context which close the colondb during free context. And there is expectation that SSS_COLONDB_SENTINEL is type of last item in line. So this patch adds simple lightening comments in doxygen style. Resolves: https://fedorahosted.org/sssd/ticket/2764 Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>

TOOLS: add sss_colondb API To simplify import/export users and groups. Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>