Ensure replacement md5 code works on bigendian systems (do we ever run on any of those?)

src/common/autoconfig.h.in

@@ -109,5 +109,7 @@
 #undef _FILE_OFFSET_BITS
 #undef _LARGE_FILES
 
+#undef WORDS_BIGENDIAN
+
 #undef HAVE_TR1_UNORDERED
 #undef HAVE_CXX0X_UNORDERED

src/configure.ac

@@ -8,6 +8,8 @@ if test C$CXX = C ; then
    AC_MSG_ERROR([C++ compiler needed. Please install one (ie: gnu g++)])
 fi
 
+AC_C_BIGENDIAN
+
 sys=`uname | tr / _ | awk -F_ '{print $1}'`
 
 if test ! -f mk/$sys ; then

src/utils/md5.cpp

@@ -17,7 +17,7 @@
  * will fill a supplied 16-byte array with the digest.
  */
 
-//#include <config.h>
+#include "autoconfig.h"
 //#include <compat.h>
 
 #include <sys/types.h>