(mchrstr, plchrstr, lchrstr, nchrstr): New member m_type, pl_type,

l_type, n_type.
(mchr_ca, plchr_ca, lchr_ca, nchr_ca): New selector type.  Update
builtin config files.

include/plane.h

@@ -99,6 +99,7 @@ struct plchrstr {
     int pl_fuel;		/* fuel consumption */
     int pl_stealth;		/* how stealthy is it? */
     int pl_flags;		/* description of capability */
+    signed char pl_type;	/* index in plchr[] */
 };
 
 #define P_B	bit(0)		/* bombing factor only for bombing */