rat is marked for autoremoval from testing

[Debian testing autoremoval watch]

rat 4.2.22-4 is marked for autoremoval from testing on 2017-11-06

It (build-)depends on packages with these RC bugs:
876590: uclmmbase: uclmmbase FTBFS with gtk-doc-tools 1.26: gtkdoc-mktmpl is no 
longer available