* configure.ac: On alpha-osf, error out if enable_tui is set to

      * configure.ac: On alpha-osf, error out if enable_tui is set to
          "yes", and set enable_tui to "no" if previously set to "auto".
          Check for waddstr only if TUI support was requested. Move the
          part of the configure script that updates various Makefile
          variables up, together with the check for waddstr.
          * configure: Regenerate.