SEC-2122: Change doc to prioritize bcrypt use
SEC-2122: Update samples to use bcrypt.

Data sources modified to store bcrypt hashes and configs now
use BCryptPassworEncoder.
SEC-2122: Update namespace to support bcrypt.

password-encoder now supports hash='bcrypt'.
SEC-1785: Remove auto-config from manual.

Changed the namespace doc to use an explicit form-login
and logout element and avoid mention of auto-config or its
effects. This makes the intro shorter and simpler.