Include frame.h before termhooks.h.

Include frame.h before termhooks.h.
(mouse_on, mouse_off, mouse_moveto, mouse_init)
(msdos_set_cursor_shape, IT_set_face, IT_write_glyphs)
(show_mouse_face, IT_clear_end_of_line, IT_clear_screen)
(IT_clear_to_end, IT_cursor_to, IT_display_cursor, IT_cmgoto)
(IT_set_terminal_modes, IT_reset_terminal_modes)
(IT_set_frame_parameters): Use tty->termscript instead of a global variable
termscript.
(IT_write_glyphs): Use tty->terminal->terminal_coding instead of a global
variable terminal_coding.  Don't refer to Vnonascii_translation_table.
(internal_terminal_init): Set Vwindow_system in current_kboard.  Don't use
TTY_CHAR_INS_DEL_OK.  Set Vinitial_window_system.  Announce date and time
of session start, if termscript is open.  Don't zero out
the_only_display_info (it is done in term.c:init_tty).  Open termscript
only of not already open.  Log "SCREEN SAVED" here, instead of
IT_set_terminal_modes.  Init mouse here instead of dos_ttraw.
Don't initialize display if this is an initial tty.  Don't set FRAME_FONT.
(Vwindow_system_version): Bump to 23.
(dos_ttraw): Accept a TTY argument; all callers fixed.  If mouse is
available, set up mouse_position_hook.
(dos_ttraw, IT_set_terminal_modes): If called with initial terminal, do
nothing.
(IT_set_frame_parameters): Handle the Qtty_type frame parameter by calling
internal_terminal_init.
(dos_set_window_size, show_mouse_face)
(clear_mouse_face, IT_note_mode_line_highlight)
(IT_note_mouse_highlight, IT_update_begin, IT_frame_up_to_date)
(dos_rawgetc): Use tty_display_info instead of x_display_info.
(initialize_msdos_display): New function.
(IT_cursor_to, IT_clear_to_end, IT_clear_screen)
(IT_clear_end_of_line, IT_insert_glyphs, IT_write_glyphs)
(IT_delete_glyphs, IT_ring_bell, IT_reset_terminal_modes)
(IT_set_terminal_modes, IT_set_terminal_window, IT_update_begin):
Accept additional argument: a pointer to a frame.  All callers changed.
(request_sigio, unrequest_sigio): Don't define, now defined on sysdep.c.
(IT_write_glyphs): Rewrite to use encode_terminal_code.