* dcrt0.cc (dlL_crt0_1): Set __argc_safe after __argc is absolutely know to be

set.
* exceptions.cc (sig_handle_tty_stop): Don't reset sigCONT event since it is
reset automatically.
* fork.cc (fork): Remove obsolete usage of PID_SPLIT_HEAP.
* include/sys/cygwin.h: Ditto.
* sigproc.cc (sig_send): Use sigframe init method to set frame since it checks
for previous ownership of the frame.
* sigproc.h (sigframe::init): Accept an "is_exception" argument.

winsup/cygwin/fork.cc

@@ -633,15 +633,6 @@ fork ()
   grouped.hParent = grouped.first_dll = NULL;
   grouped.load_dlls = 0;
 
-  if (ISSTATE(myself, PID_SPLIT_HEAP))
-    {
-      system_printf ("The heap has been split, CYGWIN can't fork this process.");
-      system_printf ("Increase the heap_chunk_size in the registry and try again.");
-      set_errno (ENOMEM);
-      syscall_printf ("-1 = fork (), split heap");
-      return -1;
-    }
-
   void *esp;
   __asm__ volatile ("movl %%esp,%0": "=r" (esp));