Filter tool on ARC and converting to WARC sets type "ARC/1.0" incorrecly instead of "WARC/1.1"

[thomasegense]

The bug is in Message.java

void serializeHeaderTo(Appendable output) throws IOException {
output.append(version().toString()); <- (MessageVersion class)
output.append("\r\n");
headers.appendTo(output);
output.append("\r\n");
}