Added a new legal notices section to the Ncat man page which is basically the same as that section in the Nmap man page (in fact it links to that section to avoid copy and pasting a bunch of text. As part of this, I had to make an enclosure file (ncatmanhtml.xml) for the ncat.xml. Otherwise I can't use things like –. And this is consistent with how we deal with the nping man page, though I'm fine with getting rid of the enclosure in both cases if there is a good way to do so