This patch instructs rkhunter about the location and use of md5.
A complete work would be to add md5sums of 4.10-RELEASE binaries.
And if someone is motivated enough, rkhunter.conf.sample could be made closer to reality.
How-To-Repeat: install rkhunter on 4.10, run "rkhunter -c", see:
Rootkit Hunter 1.1.3 is running
Determining OS... Warning: this operating system is not fully supported!
Warning: Cannot find md5_not_known
All MD5 checks will be skipped!