Make terminal_coding and keyboard_coding display-local.

Make terminal_coding and keyboard_coding display-local.

src/coding.c: Include frame.h and termhooks.h.
(terminal_coding, keyboard_coding): Remove.
(Fset_terminal_coding_system_internal, Fterminal_coding_system):
Use the selected frame's terminal coding system.
(Fset_safe_terminal_coding_system_internal): Fix typo.
(Fset_keyboard_coding_system_internal, Fkeyboard_coding_system):
Use the selected frame's keyboard coding system.
(init_coding_once): Don't initialize keyboard_coding and terminal_coding.

src/coding.h (terminal_coding, keyboard_coding): Remove.

src/termhooks.h (terminal_coding, keyboard_coding): New members of
struct display.
(FRAME_TERMINAL_CODING, FRAME_KEYBOARD_CODING): New macros.

src/termchar.h (kboard): Cosmetic change.

src/term.c (encode_terminal_code): Add coding parameter.
(tty_write_glyphs): Use the display-local terminal coding system.
(create_display): Allocate and initialize coding systems.
(delete_display): Free coding systems.

src/xdisp.c (decode_mode_spec): Use display-local coding systems.

src/Makefile.in: Fix dependencies for termchar.h and termhooks.h.

git-archimport-id: lorentey@elte.hu--2004/emacs--multi-tty--0--patch-167