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- Passwords are now saved in LDAP style: ``{SHA256}adkjiois34jhdi``.
Attention: If the hash does not start with name of an encryption scheme,
plaintext password is assumed instead of bcrypt, which was assumed in 1.x.
Migration:
- Passwords, that start with ``SHA256:``: Replace the prefix with
``{SHA256}``.
- Passwords without prefix: Add ``{BCRYPT}`` as prefix.
- Drop support for Python 2.6 and 3.3.
- Add support for Python 3.6.