* winsup.h: take out protections of environ, errno, allow C use

* *.cc: put winsup.h before other headers (for __INSIDE_CYGWIN__);
use cur_environ() instead of just environ
* times.cc: remove import protections
* glob.c: add winsup.h
* localtime.c: ditto
* smallprint.c: ditto
* Makefile.in: don't __INSIDE_CYGWIN__ as it messes up profiling.

winsup/cygwin/thread.cc

@@ -15,8 +15,8 @@ details. */
 #endif
 
 #ifdef _MT_SAFE
-#include <errno.h>
 #include "winsup.h"
+#include <errno.h>
 #include <assert.h>
 
 #include <stdlib.h>