- Rename getpty() to xgetpty() and adjust callers.

- Rewrite kbd_mode and setconsole
- Introduce and use console_make_active() and xopen_xwrite_close()
- honour buffer-reservation method as set by the user (dumpkmap, loadkmap)
- shrink rtcwake and some console-tools

  Saves about 270 Bytes

include/usage.h

@@ -875,7 +875,7 @@
 #define dumpkmap_trivial_usage \
        "> keymap"
 #define dumpkmap_full_usage "\n\n" \
-       "Print out a binary keyboard translation table to standard output"
+       "Print a binary keyboard translation table to standard output"
 #define dumpkmap_example_usage \
        "$ dumpkmap > keymap\n"