Force defines for certain errno values.

The visual studio errno.h file is conflicting with no-machine errno
constants.  Force the constants we need and define
_CRT_NO_POSIX_ERROR_CODES to avoid redefining them.  This fixes port
forwarding for visual studio implementation.

Author: dkulwin

channels.c

@@ -42,8 +42,19 @@
 #include "includes.h"
 
 #ifdef WIN32_FIXME
-  #define ECONNABORTED WSAECONNABORTED
-  #define ECONNREFUSED WSAECONNREFUSED
+#ifdef ECONNABORTED
+#undef ECONNABORTED
+#endif
+#define ECONNABORTED WSAECONNABORTED
+#ifdef ECONNREFUSED
+#undef ECONNREFUSED
+#endif
+#define ECONNREFUSED WSAECONNREFUSED
+#ifdef EINPROGRESS
+#undef EINPROGRESS
+#endif
+#define EINPROGRESS WSAEINPROGRESS
+#define _CRT_NO_POSIX_ERROR_CODES
 #endif