Currently, if you use 9.6 libpq to connect to a v10 server that requires SCRAM authentication, you get an error:
psql: authentication method 10 not supported
I'd like to apply this small patch to all the stable branches, to give a nicer error message:
psql: SCRAM authentication not supported by this version of libpq
It won't help unless you upgrade to the latest minor version, of course, but it's better than nothing. Any objections?
+1, even though it's not strictly speaking a bugfix to go in a backpatch, I think it will help enough users that it's worth doing. And I can't see how it could possibly be unsafe...
