* man.el (Man-getpage-in-background): Always use `setenv' for

* man.el (Man-getpage-in-background): Always use `setenv' for
environment variables, instead of modifying process-environment
directly.  The previous version let-bound process-environment --
the let-binding is skipped for GROFF_NO_SGR because there is
already a let-binding in effect in some outer scope.

* emulation/crisp.el (top-level): Interoperate with cua.