updated for version 7.3.836
Problem: Clipboard does not work on Win32 when compiled with Cygwin.
Solution: Move the Win32 clipboard code to a separate file and use it when
building with os_unix.c. (Frodak Baksik, Ken Takata)
diff --git a/src/config.h.in b/src/config.h.in
index e157939..422fd1f 100644
--- a/src/config.h.in
+++ b/src/config.h.in
@@ -439,3 +439,6 @@
/* Define if fcntl()'s F_SETFD command knows about FD_CLOEXEC */
#undef HAVE_FD_CLOEXEC
+
+/* Define if you want Cygwin to use the WIN32 clipboard, not compatible with X11*/
+#undef FEAT_CYGWIN_WIN32_CLIPBOARD