* server.el (server-start, server-unload-hook):

* server.el (server-start, server-unload-hook):
suspend-tty-functions has been renamed to suspend-tty-hook.

* xt-mouse.el: Likewise. resume-tty-functions has been renamed to
resume-tty-hook.

* term.c (Vsuspend_tty_hook): Rename from Vsuspend_tty_functions.
(Vresume_tty_hook): Rename from Vresume_tty_functions.
(syms_of_term): Rename suspend-tty-functions to suspend-tty-hook
and resume-tty-function to resume-tty-hook.
(Fsuspend_tty, Fresume_tty): Use new names.