Bump _WIN32_WINNT to 0x0501 throughout the code

This tells the windows headers to give us definitions that didn't
exist before XP -- like the ones that we need for IPv6 support.

See bug #5861.  We didn't run into this issue with mingw, since
mingw doesn't respect _WIN32_WINNT as well as it should for some of
its definitions.

changes/bug5861

+  o Minor bugfixes:
+    - Set _WIN32_WINNT to 0x0501 consistently throughout the code, so
+      that IPv6 stuff will compile on MSVC, and compilation issues
+      will be easier to track down. Fix for bug 5861.

configure.in

@@ -796,7 +796,7 @@ AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
 #include <sys/socket.h>
 #endif
 #ifdef _WIN32
-#define _WIN32_WINNT 0x400
+#define _WIN32_WINNT 0x0501
 #define WIN32_LEAN_AND_MEAN
 #if defined(_MSC_VER) && (_MSC_VER < 1300)
 #include <winsock.h>
@@ -820,7 +820,7 @@ AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct s
 #include <sys/socket.h>
 #endif
 #ifdef _WIN32
-#define _WIN32_WINNT 0x400
+#define _WIN32_WINNT 0x0501
 #define WIN32_LEAN_AND_MEAN
 #if defined(_MSC_VER) && (_MSC_VER < 1300)
 #include <winsock.h>

src/common/aes.c

@@ -13,7 +13,7 @@
 
 #ifdef _WIN32 /*wrkard for dtls1.h >= 0.9.8m of "#include <winsock.h>"*/
  #ifndef _WIN32_WINNT
- #define _WIN32_WINNT 0x400
+ #define _WIN32_WINNT 0x0501
  #endif
  #define WIN32_LEAN_AND_MEAN
  #if defined(_MSC_VER) && (_MSC_VER < 1300)

src/common/compat.h

@@ -10,7 +10,7 @@
 #include "torint.h"
 #ifdef _WIN32
 #ifndef _WIN32_WINNT
-#define _WIN32_WINNT 0x400
+#define _WIN32_WINNT 0x0501
 #endif
 #define WIN32_LEAN_AND_MEAN
 #if defined(_MSC_VER) && (_MSC_VER < 1300)

src/common/crypto.c

@@ -14,7 +14,7 @@
 
 #ifdef _WIN32
 #ifndef _WIN32_WINNT
-#define _WIN32_WINNT 0x400
+#define _WIN32_WINNT 0x0501
 #endif
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>

src/common/tortls.c

@@ -23,7 +23,7 @@
 #include <assert.h>
 #ifdef _WIN32 /*wrkard for dtls1.h >= 0.9.8m of "#include <winsock.h>"*/
  #ifndef _WIN32_WINNT
- #define _WIN32_WINNT 0x400
+ #define _WIN32_WINNT 0x0501
  #endif
  #define WIN32_LEAN_AND_MEAN
  #if defined(_MSC_VER) && (_MSC_VER < 1300)

src/or/or.h

@@ -24,7 +24,7 @@
 
 #ifdef _WIN32
 #ifndef _WIN32_WINNT
-#define _WIN32_WINNT 0x400
+#define _WIN32_WINNT 0x0501
 #endif
 #define WIN32_LEAN_AND_MEAN
 #endif