- Update man page a little bit more

- Update man page a little bit more
- Change do_prompt and get_prompt_line to pass meta_key and func_key
  so the calling program can DTRT when it calsl get_shortcut.  In
  particular this allows the "new file buffer" toggle on the insert file
  menu to work, and presumably other rebinding stuff should now work also.

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4226 35c25a1d-7b9e-4130-9fde-d3aeb78583b8