Cygwin: sockets: Handle SO_RCVTIMEO and SO_SNDTIMEO

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

winsup/cygwin/fhandler.h

@@ -523,6 +523,13 @@ class fhandler_socket: public fhandler_base
   void rmem (int nrmem) { _rmem = nrmem; }
   void wmem (int nwmem) { _wmem = nwmem; }
 
+ private:
+  DWORD _rcvtimeo; /* msecs */
+  DWORD _sndtimeo; /* msecs */
+ public:
+  DWORD &rcvtimeo () { return _rcvtimeo; }
+  DWORD &sndtimeo () { return _sndtimeo; }
+
  private:
   struct _WSAPROTOCOL_INFOW *prot_info_ptr;
  public: