PANICTRACE (stacktrace on panic or signal) + bits

On crash signal or panic(), use a configurable method to get a stacktrace
the user can easily report to us.  Currently only for Unix/Linux and only
ifdef BETA.  Hopefully ports can add additional methods.

Bits:
- linux hints file had PREFIX definition in the wrong place
- sample sysconf file used wrong delimiter for WIZARDS
- fix grammar error in support message when using sysconf.wizards
- options.c comment typo
- capitalize "Crash test" output from #panic command

src/cmd.c

@@ -682,7 +682,7 @@ STATIC_PTR int
 wiz_panic(VOID_ARGS)
 {
 	if (yn("Do you want to call panic() and end your game?") == 'y')
-		panic("crash test.");
+		panic("Crash test.");
         return 0;
 }