Keymap() action

Description
Keymap sets or clears a temporary c3270 keymap.

If one parameter is specified, it is taken as the name of a temporary keymap, which is added to the current keymap. If there are any entries in the temporary keymap that overlap entries in the current keymap, those entries will be overridden by the entries in the temporary keymap.

If no parameters are specified, any temporary keymap will be removed.