Include ws2_32 when trying to link openssl on windows in autoconf

Fixes bug 23783; bugfix on 0.3.2.2-alpha when we started looking for
TLSv1_1_method().

changes/bug23783

@@ -0,0 +1,5 @@
+  o Minor bugfixes (compilation, windows):
+    - When detecting OpenSSL on Windows from our configure script, make sure
+      to try linking with the ws2_32 library. Fixes bug 23783; bugfix on
+      0.3.2.2-alpha.
+

configure.ac

@@ -724,7 +724,7 @@ AC_ARG_WITH(ssl-dir,
   ])
 
 AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
-TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
+TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
     [#include <openssl/ssl.h>],
     [struct ssl_method_st; const struct ssl_method_st *TLSv1_1_method(void);],
     [TLSv1_1_method();], [],