gnus-registry-ignored-groups (was: gnus-registry question)

[Ted Zlatanov <tzz@lifelogs.com>]

OK, here's the straight answer to gnus-registry-ignored-groups:

I had forgotten about it, and my comment was wrong.  It is indeed
used.

gnus-registry-ignored-groups is used when deciding if a group name
should be stored at all.  There's also a registry-ignore group
parameter that will do the same thing.

gnus-registry-unfollowed-groups and
nnmail-split-fancy-with-parent-ignore-groups are used when we get a
group name, and decide if we should give it back.  So the *ignored*
groups never get in the registry, while the *unfollowed* groups are
filtered out.

This is actually a meaningful difference.  Registry entries currently
get deleted when there are no more groups associated with them.
Thus, if you value the registry information about articles in a
group, you'd use gnus-registry-unfollowed-groups.  If you never want
to hear about articles in a group, you'd use
gnus-registry-ignored-groups.

nnmail-split-fancy-with-parent-ignore-groups has an unfortunately
confusing name.  It is analogous to gnus-registry-unfollowed-groups.

The above will *definitely* go in the manual.  Sorry for the confusion!

Ted