granular verbose message suppression mechanics

Switch to using a macro invocation Verbos(n, s) in place of the
flags.verbose checks.

Provide the mechanics for individual suppression of any of the
existing messages that were considered verbose.

Mechanics only - this code update does not provide any means of
setting the suppression bits.

iflags.verbose = 0
is still a master suppression of all the verbose messages.

iflags.verbose = 1
turns on the verbose messages only for those whose suppression
bit is 0 (not set).

src/detect.c

@@ -1227,12 +1227,12 @@ use_crystal_ball(struct obj **optr)
     }
 
     /* read a single character */
-    if (flags.verbose)
+    if (Verbose(0, use_crystal_ball1))
         You("may look for an object, monster, or special map symbol.");
     ch = yn_function("What do you look for?", (char *) 0, '\0');
     /* Don't filter out ' ' here; it has a use */
     if ((ch != def_monsyms[S_GHOST].sym) && index(quitchars, ch)) {
-        if (flags.verbose)
+        if (Verbose(0, use_crystal_ball2))
             pline1(Never_mind);
         return;
     }