[ClusterLabs] FYI: one more regression introduced in Pacemaker 2.1.3

[Ken Gaillot]

Hi all,

Another regression was found that was introduced in Pacemaker 2.1.3.

As part of trying to make the output of various commands more
consistent, as of 2.1.3, "crm_attribute --quiet --query" prints
"(null)" for an attribute that does not exist. Previously, it would not
print anything.

Unfortunately, certain resource agents, at least including redis,
depended on the previous behavior. The agents most likely to be
affected are those for promotable resources.

The original behavior is restored as of commit 9853f4d05 in the main
branch. Users who use promotable resources are advised to wait until
the fix is released (expected in 2.1.5 at the end of this year) or
ensure that their OS packages include the fix if using 2.1.3 or 2.1.4.
-- 
Ken Gaillot <kgaillot at redhat.com>