security/sssd is still on 1.11 and the maintainer has not updated this port in literal years. The port does not function at all with any supported version of Samba. The last maintainer commit was a URL change in 2017; this version of sssd is from 2015.
Bugs have been opened requesting updates to 1.13 (LTM), 1.15, and 2.x since, with no action and no success. This version may also contain a vulnerability - CVE-2018-10852 - and is likely to contain unknown vulnerabilities. It also only functions with known vulnerable versions of Samba.
All upstream support for sssd 1.11 was ended more than 3 years ago now. Since this port cannot function, and no progress has been made in updating to a supported or functioning version of the port, it should be removed.
Take this while I clean up and re-triage existing bugs against security/sssd.
Here you are:
This can now be closed as sssd was updated to version 1.16.5 in r555585.