(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/land.h

@@ -124,6 +124,7 @@ struct lchrstr {
     u_char l_fuelu;		/* fuel used per 10 mob */
     u_char l_nxlight;		/* maximum number of xlight planes */
     u_char l_nland;		/* maximum number of units */
+    signed char l_type;		/* index in lchr[] */
     long l_flags;		/* what special things can this unit do */
 };
 

include/nuke.h

@@ -64,6 +64,7 @@ struct nchrstr {
     int n_tech;			/* tech needed to build */
     int n_weight;
     int n_flags;		/* description of capability */
+    signed char n_type;		/* index in nchr[] */
 };
 
 #define	N_NEUT	bit(0)		/* Neutron bomb (low damage, high fallout) */

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 */

include/ship.h

@@ -149,6 +149,7 @@ struct mchrstr {
     long m_flags;		/* what special things can this ship do */
     u_char m_nplanes;		/* maximum number of planes this ship holds */
     u_char m_nland;		/* maximum number of units this ship holds */
+    signed char m_type;		/* index in mchr[] */
 };
 
 #define M_FOOD		bit(0)	/* catch that fish! */