outrip() updating (trunk only)

Part II of the bones tracking patch.  Change umpteen different outrip()
routines to handle its new time_t argument, and use formatkiller() instead
of directly accessing killer.{format,name} and killed_by_prefix[].  The
latter is now static within formatkiller().

     The many sys/* and win/* changes are untested....

src/rip.c

@@ -6,8 +6,6 @@
 
 STATIC_DCL void FDECL(center, (int, char *));
 
-extern const char * const killed_by_prefix[];	/* from topten.c */
-
 #if defined(TTY_GRAPHICS) || defined(X11_GRAPHICS) || defined(GEM_GRAPHICS) || defined(MSWIN_GRAPHICS)
 # define TEXT_TOMBSTONE
 #endif