* dcrt0.cc (dll_crt0_0): Eliminate muto::init call.

* sync.h (locker): New, currently unused class.
(muto::init): Eliminate.
* sync.cc (muto::init): Ditto.
(muto::init): Eliminate critical section lock and instead use name as a guard
to prevent against multiple attempts to initialize the same muto.
* pinfo.cc (pinfo::init): Set myself procinfo when not execing and pid matches
windows pid or cygwin pid.

winsup/cygwin/sync.h

@@ -40,10 +40,15 @@ public:
   void upforgrabs () {tls = this;}  // just set to an invalid address
   void grab () __attribute__ ((regparm (1)));
   static void set_exiting_thread () {exiting_thread = GetCurrentThreadId ();}
-  static void init ();
 };
 
-extern muto muto_start;
+class locker
+{
+  muto *room;
+public:
+  locker (muto *m) {room = m; room->acquire ();}
+  ~locker () {room->release ();}
+};
 
 /* Use a statically allocated buffer as the storage for a muto */
 #define new_muto(__name) \