* Added gmtime/localtime/mktime and SYSV timezone globals to timemodule.c.

Added $(SYSDEF) to its build rule in Makefile.
* cgensupport.[ch], modsupport.[ch]: removed some old stuff.  Also
  changed files that still used it...  And made several things static
  that weren't but should have been...  And other minor cleanups...
* listobject.[ch]: add external interfaces {set,get}listslice
* socketmodule.c: fix bugs in new send() argument parsing.
* sunaudiodevmodule.c: added flush() and close().

Modules/mathmodule.c

@@ -33,6 +33,9 @@ extern int errno;
 
 #include "modsupport.h"
 
+#define getdoublearg(v, a) getargs(v, "d", a)
+#define get2doublearg(v, a, b) getargs(v, "(dd)", a, b)
+
 #include <math.h>
 
 #ifdef i860