Wrapping up 3.1

We're planing to wrap up Zeek 3.1 this week with code freeze on Friday
and then a beta version out early next week. The 3.1.0 GitHub project
shows the current state, please make sure we have tickets on there for
everything that's critical to still go in.

Please all take a look at master's NEWS to see if it mentions
everything we should point us. I'm also planing to take that as the
starting point for a blog posting announcing 3.1.