* server.c (process_serial_event): Re-return unsupported, not

	* server.c (process_serial_event): Re-return unsupported, not
	error, if the type isn't recognized.  Re-allow supporting only
	insert or remove packets.  Also call require_running for
	breakpoints.  Add missing break statement to default case.  Tidy.
	* target.h (struct target_ops): Rename insert_watchpoint to
	insert_point, and remove_watchpoint to remove_point.

	* linux-low.h (struct linux_target_ops): Likewise.
	* linux-low.c (linux_insert_watchpoint): Rename to ...
	(linux_insert_point): ... this.  Adjust.
	(linux_remove_watchpoint): Rename to ...
	(linux_remove_point): ... this.  Adjust.
	(linux_target_ops): Adjust.
	* linux-crisv32-low.c (cris_insert_watchpoint): Rename to ...
	(cris_insert_point): ... this.
	(cris_remove_watchpoint): Rename to ...
	(cris_remove_point): ... this.
	(the_low_target): Adjust.