[crypto] Encode unicode strings in _cypherer()
pycrypto accept both bytes or string but pycryptodome, which will be introduced
in next changeset, doesn't accept this.
For backward compatibility, encode unicode strings in _cypherer()
Document: cubicweb-doc
Title: CubicWeb Documentation
Author: Logilab
Abstract: Some base documentation for CubicWeb users and developpers
Section: Apps/Programming
Format: HTML
Index: /usr/share/doc/python-cubicweb-documentation/html/index.html
Files: /usr/share/doc/python-cubicweb-documentation/html/*