o Revert a previous delta as strlcpy(3) operates with NUL-terminated

strings and cp is not.  Fix logic in the original code and eliminate
core dumps on lines without '\n'.

sbin/devfs/devfs.c

@@ -162,7 +162,8 @@ efgetln(FILE *fp, char **line)
 		*line = malloc(rv + 1);
 		if (*line == NULL)
 			errx(1, "cannot allocate memory");
-		rv = strlcpy(*line, cp, rv + 1);
+		memcpy(*line, cp, rv);
+		(*line)[rv] = '\0';
 	}
 	assert(rv == strlen(*line));
 	return (rv);