Comment 29 for bug 1761737

For the release team: this fixes a crash bug, but in a not very common scenario: domain was joined via sssd and not samba's net join command, and the config tells samba to look first at the secrets database which is only populated via net join.

The MP at https://code.launchpad.net/~ahasenack/ubuntu/+source/samba/+git/samba/+merge/343614 has a simple test case.

There is no need to respin isos because of this, but if it happens for some other reason, it would be cool if this could get in. Otherwise, I can transform it into an SRU for bionic once CC is opened for development.