issue2551251 - migrate pbkdf2 passwords ... test fixes and doc update Fixed a couple of tests where calls to needs_migration() was missing its config parameter. Documented need to update config.ini's password_pbkdf2_default_rounds.

try:
    # Python 3+
    from ssl import SSLError
except (ImportError, AttributeError):
    # Python 2.5-2.7
    from socket import sslerror as SSLError