[Reportbug-maint] Bug#853915: Bugreports and base64

[Nis Martensen]

control: clone 853915 -1
control: reassign 853915 python-debianbts
control: retitle -1 reportbug: base64 encoded reports rejected by bts

Reading and sending base64 message are two different bugs, so let's
split this report.

I believe that python-debianbts is supposed to decode a base64 message
body, therefore I'm reassigning the base64 reading bug.  Please reassign
back to reportbug if this assumption is wrong.