Release Process
The last release v5.1.0 was from December 15, 2014, (See: Timeline). We need to have more frequent releases for PRoot, so that new features can be tested.
Next Major Release
Given that this whole seccomp situation is a rather major change, the next version of PRoot will likely be of the 6.x.x variant. I'll need to look into this a bit further, and check to see if this actually changes the public API.
Pre-Releases
It would be good to publish pre-releases so that users can test any new features or changes.