Log Message:
cwm: Update to 7.1

Changelog:

2022-04-30: Eighth public release 7.1 of portable cwm.

Changes made between OpenBSD 6.9 and 7.0
* Changed cwm(1) maximization and full-screen mode toggling to keep
  the cursor within the window, preventing focus loss.

Changes made between OpenBSD 7.0 and 7.1
* Added a cwm(1) "group-last" command that shows only the previously
  active group.
* Allowed bare numbers for key and mouse bindings in cwm(1).