Hi,
the SSSD upstream supports some selected branches for a longer time, to
make life easier for long-term supported distributions such as Red Hat
Enterprise Linux, Ubuntu LTM or Suse Enterprise Linux.
Since the sssd-1.13 branch is quite stable and already used in several
long-term supported distributions, we decided to formally proclaim it as
a LTM (Long-Term Maintenance) release. We will be backporting important
fixes to the branch and release updates as appropriate.
Packagers and maintainers of stable distributions are encouraged to use
the sssd-1.13 releases. Please let us know (by filing a ticket or sending a
mail to sssd-devel) if you need any fixes backported to the sssd-1-13 branch.
I've updated the SSSD Trac front page:
https://fedorahosted.org/sssd/wiki/WikiStart
and the Releases page:
https://fedorahosted.org/sssd/wiki/Releases
to reflect that.