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

sys/unix/unixmain.c

@@ -139,6 +139,12 @@ char *argv[];
 		initoptions_init();
 		read_config_file(SYSCF_FILE, SET_IN_SYS);
 		initoptions_finish();
+#endif
+#ifdef PANICTRACE
+		ARGV0 = argv[0];	/* save for possible stack trace */
+# ifndef NO_SIGNAL
+		panictrace_setsignals(TRUE);
+# endif
 #endif
 		prscore(argc, argv);
 		exit(EXIT_SUCCESS);
@@ -164,6 +170,12 @@ char *argv[];
 	read_config_file(SYSCF_FILE, SET_IN_SYS);
 #endif
 	initoptions_finish();
+#ifdef PANICTRACE
+	ARGV0 = argv[0];	/* save for possible stack trace */
+# ifndef NO_SIGNAL
+	panictrace_setsignals(TRUE);
+# endif
+#endif
 	exact_username = whoami();
 
 	/*