rvinterf backslash escape: introduce libprint The new helper function library named libprint is meant to replace the badly misnamed libg23, and will soon contain functions for printing all of the same kinds of GPF TST packets that are now handled in libg23. However, we are also moving safe_print_trace() from libasync to this new library, and changing it to emit our new backslash escape format.

/*
 * Data structures for parsing structured responses to AT commands
 */

struct resp_field {
	int		type;
	unsigned	num;
	char		*str;
};

#define	RESP_FIELD_EMPTY	0
#define	RESP_FIELD_NUMBER	1
#define	RESP_FIELD_STRING	2