monster gender-related follow-ups

remove unintentionally left M2_MALE flag on dwarf lord/lady/leader

provide a way to verify gender information relayed from the core
in debug mode on tty via #wizmgender debugging extended command

include/flag.h

@@ -294,6 +294,7 @@ struct instance_flags {
     boolean cmdassist;       /* provide detailed assistance for some comnds */
     boolean time_botl;       /* context.botl for 'time' (moves) only */
     boolean wizweight;       /* display weight of everything in wizard mode */
+    boolean wizmgender;      /* test gender info from core in window port */
     /*
      * Window capability support.
      */