Make function-key-map a terminal-local variable (move it inside the kboard struct).

Make function-key-map a terminal-local variable (move it inside the kboard struct).

* src/keyboard.h (kboard): Move Vfunction_key_map inside the kboard struct.

* src/keyboard.c (Vfunction_key_map): Remove declaration.
  (read_key_sequence, init_kboard): Update references to Vfunction_key_map.
  (syms_of_keyboard): Declare function-key-map as a terminal-local variable.
  (mark_kboards): Mark Vfunction_key_map.

* src/keymap.c (Vfunction_key_map): Remove.
  (Fdescribe_buffer_bindings): Update references to Vfunction_key_map.
  (syms_of_keymap): Remove DEFVAR for Vfunction_key_map.

* src/term.c (term_get_fkeys_1): Update references to Vfunction_key_map.

git-archimport-id: lorentey@elte.hu--2004/emacs--multi-tty--0--patch-355