Catch all botan exception when sending data, not just TLS

On invalid ASN1 file or things that are not specific to TLS only, botan
throws other exceptions, and we need to catch those as well.

fix #3460

src/network/tcp_socket_handler.cpp

@@ -194,7 +194,7 @@ void TCPSocketHandler::send_data(std::string&& data)
   if (this->use_tls)
     try {
       this->tls_send(std::move(data));
-    } catch (const Botan::TLS::TLS_Exception& e) {
+    } catch (const Botan::Exception& e) {
       this->on_connection_close("TLS error: "s + e.what());
       this->close();
       return ;