Reserve save file space for new conducts and options

This will make it possible to change conducts and options in the
future without breaking the save format.

include/flag.h

@@ -156,6 +156,15 @@ struct flag {
     boolean showrace;  /* show hero glyph by race rather than by role */
     boolean travelcmd; /* allow travel command */
     int runmode;       /* update screen display during run moves */
+
+    int reserved1;
+    int reserved2;
+    int reserved3;
+    int reserved4;
+    int reserved5;
+    int reserved6;
+    int reserved7;
+    int reserved8;
 };
 
 /*

include/you.h

@@ -160,6 +160,10 @@ struct u_conduct {     /* number of times... */
     long sokocheat;    /* violated special 'rules' in Sokoban */
     long pets;         /* obtained a pet */
     /* genocides already listed at end of game */
+    long reserved1;
+    long reserved2;
+    long reserved3;
+    long reserved4;
 };
 
 struct u_roleplay {
@@ -168,6 +172,9 @@ struct u_roleplay {
     boolean deaf;    /* permanently deaf */
     boolean pauper;  /* no starting inventory */
     boolean reroll;  /* starting inventory/attr rerolling enabled */
+    boolean reserved1;
+    boolean reserved2;
+    boolean reserved3;
     long numbones;   /* # of bones files loaded */
     long numrerolls; /* # of rerolls used */
 };