remctl 2.10

I finally found time this weekend to incorporate a bunch of additional work by Marcus Watts, including a Java client that speaks protocol v2 (yay!) and a Java server. I also fixed a ton of minor bugs that I'd been saying "next release" for. I really went rather too long between releases this time, so it's good to get a release out.

Expect more in the not too distant future, since several other schools seem to be deploying remctl and feeding me patches. Very gratifying, that.