* 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/pinfo.cc

@@ -173,7 +173,8 @@ void
 pinfo::init (pid_t n, DWORD flag, HANDLE h0)
 {
   h = NULL;
-  if (myself && n == myself->pid)
+  if (myself && !(flag & PID_EXECED)
+      && (n == myself->pid || (DWORD) n == myself->dwProcessId))
     {
       procinfo = myself;
       destroy = 0;