(gnus-registry-split-fancy-with-parent): when long names are in
use, strip the name if we're in the native server, or else return nothing
(gnus-registry-spool-action, gnus-registry-action): use
(gnus-registry-split-fancy-with-parent): when long names are in
use, strip the name if we're in the native server, or else return nothing
(gnus-registry-spool-action, gnus-registry-action): use