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

include/decl.h

@@ -1,5 +1,4 @@
 /* NetHack 3.5	decl.h	$Date$  $Revision$ */
-/*	SCCS Id: @(#)decl.h	3.5	2008/07/20	*/
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -390,6 +389,10 @@ struct autopickup_exception {
 };
 #endif /* AUTOPICKUP_EXCEPTIONS */
 
+#ifdef PANICTRACE
+E char *ARGV0;
+#endif
+
 #undef E
 
 #endif /* DECL_H */

include/extern.h

@@ -643,6 +643,9 @@ E void FDECL(dealloc_killer, (struct kinfo*));
 E void FDECL(save_killers, (int,int));
 E void FDECL(restore_killers, (int));
 E char *FDECL(build_english_list, (char *));
+#if defined(PANICTRACE) && !defined(NO_SIGNAL)
+E void FDECL(panictrace_setsignals, (boolean));
+#endif
 
 /* ### engrave.c ### */
 

include/global.h

@@ -1,5 +1,4 @@
 /* NetHack 3.5	global.h	$Date$  $Revision$ */
-/*	SCCS Id: @(#)global.h	3.5	2007/01/12	*/
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -366,4 +365,18 @@ struct savefile_info {
 #define MAXMONNO	120	/* extinct monst after this number created */
 #define MHPMAX		500	/* maximum monster hp */
 
+#ifdef BETA
+/* see end.c */
+# ifndef PANICTRACE
+#  define PANICTRACE
+# endif
+#endif
+/* The following are meaningless if PANICTRACE is not defined: */
+#if defined(__linux__) && defined(__GLIBC__) && (__GLIBC__ >= 2)
+# define PANICTRACE_GLIBC
+#endif
+#ifdef UNIX
+# define PANICTRACE_GDB
+#endif
+
 #endif /* GLOBAL_H */

include/sys.h

@@ -1,5 +1,4 @@
 /* NetHack 3.5	sys.h	$Date$  $Revision$ */
-/*    SCCS Id: @(#)sys.h      3.5     2008/01/30      */
 /* Copyright (c) Kenneth Lorber, Kensington, Maryland, 2008. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -21,6 +20,14 @@ struct sysopt {
 	int pers_is_uid;
 	int entrymax;
 	int pointsmin;
+#ifdef PANICTRACE
+		/* panic options */
+	char *gdbpath;
+	int  panictrace_gdb;
+# ifdef PANICTRACE_GLIBC
+	int panictrace_glibc;
+# endif
+#endif
 };
 E struct sysopt sysopt;