This is the first release of the greatly improved version 8 of rsyslog. Large parts of the core engine have been rewritten in order to support even greater performance and newly things like global variable support in RainerScript. The new engine is the foundation for the next couple of years of rsyslog technology. As another major design feature, an interface for external plugins has been added. Version 8.2 supports external output plugins, but external message modification and input plugins are also schedule to appear soon.
With the release of version 8, 7.6 is being as officially supported stable. However, we will support 7.6 for some while. So there is no urgent need to upgrade to v8.
As always, feedback is appreciated.