* remote.c (remote_wait): Make regs be char to avoid picayune

* remote.c (remote_wait):  Make regs be char to avoid picayune
ANSI compiler warnings.

* energize.h:  Move all external struct decls to inside of
__STDC__, add prototype for energize_shell_wait().
* energize.c (getpty):  Clean up, make us really get a controlling
terminal.
* (energize_initialize):  Disable SIGIO prior to setting up for
I/O interrupts.  Move setsid(), et. al. to getpty().
* (energize_shell_wait):  New routine to wait for things started
via the shell command, uses wait() instead of /dev/proc.
* Also, add prototype for execute_command_1().