gnus-cache-rename-group

gnus-cache-rename-group is an autoloaded Lisp function in `gnus-cache.el'.

(gnus-cache-rename-group OLD-GROUP NEW-GROUP)

Rename OLD-GROUP as NEW-GROUP.
Always updates the cache, even when disabled, as the old cache
files would corrupt Gnus when the cache was next enabled. It
depends on the caller to determine whether group renaming is
supported.