Avoid catch all the exceptions.

git-svn-id: svn://bind10.isc.org/svn/bind10/branches/trac221@2213 e5f2f494-b856-4b98-b285-d166d9295462

src/bin/auth/auth_srv.cc

@@ -348,7 +348,7 @@ AuthSrvImpl::processAxfrQuery(const IOMessage& io_message, Message& message,
         axfr_client_.sendXfroutRequestInfo(io_message.getSocket().getNative(),
                                          io_message.getData(),
                                          io_message.getDataSize());
-    } catch (const exception& err) { // XXX: avoid catch-all catch!!
+    } catch (const XfroutError& err) { // XXX: avoid catch-all catch!!
         if (is_xfrin_connection_established_) {
             axfr_client_.disconnect();
             is_xfrin_connection_established_ = false;