The mod_wsgi warnings are notifying you of a potential dependency problem. While it is unlikely to be an issue (it is not common for there to be significant API differences between a x.y.z release and x.y.z+1) it does not know this for sure so warns you that there is a potential issue. The only way to sort this is to recompile the module against the newer version, and if you are using the standard packages you will need to wait for the package maintainers to do this. If you have compile Apache (or just that module) yourself, then you can do the recompile (you could also even if you are using the distro's standard packages, but I'd not recommend this for such a small issue).
The "apache has started" notice has been going into the error logs for quite some time IIRC. In many environments a restart is a problem that could cause downtime, so it is probably valid to be there as a "notice" level message for automated log scanners to pick up and report on if it happens outside of a planned maintenance window.