Main, ...: catch any exception, not just std::runtime_error

src/event/ServerSocket.cxx

@@ -220,11 +220,11 @@ ServerSocket::Open()
 
 		try {
 			i.Open();
-		} catch (const std::runtime_error &e) {
+		} catch (...) {
 			if (good != nullptr && good->GetSerial() == i.GetSerial()) {
 				const auto address_string = i.ToString();
 				const auto good_string = good->ToString();
-				FormatError(e,
+				FormatError(std::current_exception(),
 					    "bind to '%s' failed "
 					    "(continuing anyway, because "
 					    "binding to '%s' succeeded)",