SECRETS: Add configurable payload size limit of a secret
Resolves:
https://fedorahosted.org/sssd/ticket/3169
Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>
Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>
(cherry picked from commit 7171a7584dda534dde5409f3e7f4657e845ece15)