Bug#936362: cysignals: Python2 removal in sid/bullseye - reopen 936362

[Sandro Tosi]

Control: reopen -1

This bug was closed, but the package has still some dependencies towards
Python2 packages, in details:

(source:cysignals)Build-Depends-Indep->python-docutils

Re-opening, so that they can be taken care of.