t_apropos.x
	Changed length of the apropos database name buffer in order to
	handle more apropos databases at the same time (PG 09/May/90).

t_mkapropos.x
	Minor fixes in messages (PG 09/May/90).

t_apropos.x
	Increased the size of the string that handles the apropos
	environment variable contents (SZ_APROPOSDB) from 300 to
	512 characters (PG 02/Jul/91).