Put back BEAST_CATCH_UNHANDLED_EXCEPTIONS macro, but disabled by default

Builds/VisualStudio2012/BeastConfig.h

@@ -74,6 +74,16 @@
 //#define BEAST_COMPILER_CHECKS_SOCKET_OVERRIDES 1
 #endif
 
+/** Config: BEAST_CATCH_UNHANDLED_EXCEPTIONS
+    This will wrap thread entry points with an exception catching block.
+    A customizable hook is provided to get called when unhandled exceptions
+    are thrown.
+    @see ProtectedCall
+*/
+#ifndef   BEAST_CATCH_UNHANDLED_EXCEPTIONS
+//#define BEAST_CATCH_UNHANDLED_EXCEPTIONS 1
+#endif
+
 //------------------------------------------------------------------------------
 //
 // Libraries

modules/beast_core/diagnostic/beast_ProtectedCall.cpp

@@ -314,6 +314,7 @@ void ProtectedCall::call (Call& c)
     if (handler == nullptr)
         handler = &defaultHandler;
 
+#if BEAST_CATCH_UNHANDLED_EXCEPTIONS
     try
     {
         c ();
@@ -324,6 +325,11 @@ void ProtectedCall::call (Call& c)
 
         handler->onException (e);
     }
+
+#else
+    c ();
+
+#endif
 }
 
 //------------------------------------------------------------------------------

modules/beast_core/system/BeastConfigCheck.h

@@ -56,7 +56,7 @@
 #endif
 
 #ifndef BEAST_CATCH_UNHANDLED_EXCEPTIONS
-#define BEAST_CATCH_UNHANDLED_EXCEPTIONS 1
+#define BEAST_CATCH_UNHANDLED_EXCEPTIONS 0
 #endif
 
 #if BEAST_DEBUG && ! defined (BEAST_CHECK_MEMORY_LEAKS)