Added the --disable-dot11 configure switch.

src/dot11/dot11_mgmt.cpp

@@ -27,8 +27,10 @@
  *
  */   
 
-#include <cstring>
 #include "dot11/dot11_mgmt.h"
+#ifdef HAVE_DOT11
+
+#include <cstring>
 #include "rsn_information.h"
 
 namespace Tins {
@@ -638,4 +640,6 @@ Dot11ManagementFrame::vendor_specific_type
     );
 }
 
-} // namespace Tins
+} // namespace Tins
+
+#endif // HAVE_DOT11