Merge pull request #75 from mrdomino/master

Remove remainder of sprintf & strcpy calls
New chat ready for testing.
Merge branch 'master' of github.com:urbit/urbit
Get it building on OpenBSD 4.8

This patch results in successful compilation on <http://devio.us/>.
Sadly I can't guarantee anything more than that yet, since their ulimits
are impossible to change and insufficient to make vere happy.