jodd-http/src/main/java/jodd/http/HttpBrowser.java
protected void addDefaultHeaders(final HttpRequest httpRequest) {
		for (Map.Entry<String, String> entry : defaultHeaders.entries()) {
			String name = entry.getKey();

			if (!httpRequest.headers.contains(name)) {
				httpRequest.headers.add(name, entry.getValue());
			}
		}
	}
protected void addDefaultHeaders(final HttpRequest httpRequest) {
		for (Map.Entry<String, String> entry : defaultHeaders.entries()) {
			String name = entry.getKey();

			if (!httpRequest.headers.contains(name)) {
				httpRequest.headers.add(name, entry.getValue());
			}
		}
	}
Add default headers to the request. If request already has a header set,
default header will be ignored.