-WARNS6 cleanup (7422 warnings)

-WARNS6 cleanup (7422 warnings)
-ANSI function declarations
-staticize functions
-use stdbool.h where needed
-remove (void) casts for unchecked function returns
-put extern function declarations and variables in hack.h
-remove code that was previously commented out
-rename local variables where needed that were colliding with globals
-use variable argument lists from stdarg.h
-add DragonFly keyword