Bug#789753: Add Python 3 support to ca-certificates source.

[Michael Shuler]

Control: tags -1 + pending

Committed to git and test build works fine for me with sid cowbuilder. I 
have not gone through attempting to set up a python3-only system to test 
build, so hopefully, it "just works". :)

http://anonscm.debian.org/cgit/collab-maint/ca-certificates.git/commit/?id=a2fa9a13815894500e1e2d9ca3d52bfdd4f75b5a

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Kind regards,
Michael