Change foo (void) to foo () for all c++ functions throughout. Remove all

fhandler_*::dump functions throughout.
* fhandler.h (fhandler_dev_mem::close): Remove pass-through function in favor
of virtual method.
(handler_dev_raw::close): Ditto.
(fhandler_dev_clipboard::fixup_after_exec): New method.
* fhandler_dev_mem.cc (fhandler_dev_mem::close): Eliminate pass through
* fhandler_dev_raw.cc (fhandler_dev_raw::close): Ditto.
* fhandler_clipboard.cc (fhandler_dev_clipboard::close): Don't go to extra
effort when execing.
(fhandler_dev_clipboard::fixup_after_exec): New function.
* fhandler_console.cc (fhandler_console::close): Don't do "extra stuff" when we
know we're execing.
* fhandler_disk_file.cc (fhandler_disk_file::close): Ditto.
* fhandler_dsp.cc (fhandler_dev_dsp::close): Ditto.
* fhandler_fifo.cc (fhandler_fifo.cc::close): Ditto.  function in favor of base
function.
* fhandler_random.cc (fhandler_dev_random::close): Ditto.
* fhandler_registry.cc (fhandler_registry::close): Ditto.
* fhandler_tty.cc (fhandler_tty_slave::close): Ditto.
* fhandler_virtual.cc (fhandler_virtual::close): Ditto.
* pinfo.cc (proc_waiter): Remove unneeded hExeced declaration.
* sigproc.cc: Ditto.
* winsup.h (hExeced): Define here.
* fhandler_virtual.cc (fhandler_virtual::fixup_after_exec): Just call close()
to reinitialize things to known state.

winsup/cygwin/tty.cc

@@ -55,7 +55,7 @@ ttyslot (void)
 }
 
 void __stdcall
-tty_init (void)
+tty_init ()
 {
   if (!myself->cygstarted && NOTSTATE (myself, PID_CYGPARENT))
     cygheap->fdtab.get_debugger_info ();
@@ -105,7 +105,7 @@ create_tty_master (int ttynum)
 }
 
 void __stdcall
-tty_terminate (void)
+tty_terminate ()
 {
   if (NOTSTATE (myself, PID_USETTY))
     return;
@@ -125,7 +125,7 @@ attach_tty (int num)
 }
 
 void
-tty_list::terminate (void)
+tty_list::terminate ()
 {
   int ttynum = myself->ctty;
 
@@ -186,7 +186,7 @@ tty_list::connect_tty (int ttynum)
 }
 
 void
-tty_list::init (void)
+tty_list::init ()
 {
   for (int i = 0; i < NTTYS; i++)
     {
@@ -365,7 +365,7 @@ tty::create_inuse (const char *fmt)
 }
 
 void
-tty::init (void)
+tty::init ()
 {
   output_stopped = 0;
   setsid (0);