[rdiff-backup-users] Version incompatibility and availability

[Scot Wilcoxon]

I ran headlong into the version incompatibility problem, because I'm
running different versions of Ubuntu thus there are different rdiff-backup
versions packaged on the two systems.

I don't see documentation for the version compatibility rules.  Is it
required that all the clients and servers be the same version?  That
greatly reduces the benefits of packaging systems, if manual recompilation
on many systems is needed.

Not even my newest Ubuntu server can be trusted with rdiff-backup.  It
only has 1.2.7, and you're not offering that version, so I can't install
1.2.7 on other systems.

Not a good start in attempting to use this.