* cygthread.cc (cygthread::detach): Revert to just waiting for thred event

since waiting for anything else is racy.
* timer.cc (timer_tracker::hcancel): Rename from cancel.
(timer_tracker::cancel): New method.
(timer_tracker::th): Remove.
(timer_tracker::~timer_tracker): Call cancel method.
(timer_tracker::timer_tracker): Ditto.
(timer_tracker::timer_tracker): Always, clear cancel, even though it is
probably not strictly necessary for ttstart.
(timer_thread): Accommodate cancel -> hcancel rename.
(timer_tracker::settime): Ditto.
(timer_tracker::gettime): Ditto.
(timer_delete): Ditto.
* cygwin.din: Export _ctype_.
* include/ctype.h: Mark that _ctype_ is imported.

winsup/cygwin/include/ctype.h

@@ -38,7 +38,11 @@ int __cdecl _toupper(int);
 #define _X	0100
 #define	_B	0200
 
+#ifdef __INSIDE_CYGWIN__
 extern const char _ctype_[];
+#else
+extern const __declspec(dllimport) char _ctype_[];
+#endif
 
 #if !defined(__cplusplus) || defined(__INSIDE_CYGWIN__)
 #define	isalpha(c)	((_ctype_+1)[(unsigned)(c)]&(_U|_L))