We have just released v 7.3.9 of the rsyslog development branch. The most important feature of this release is the capability to digitally sign log files. This is done via RFC3161. It also contains some other feature enhancements as well as bug fixes. Note that 7.3.9 is almost feature-complete and can be considered a beta. It is our goal to release a new v7.4 stable within the next few weeks.
As always, feedback is appreciated.