---
prelude: >
  - Improved configuration option descriptions and handling.
other:
  - |
    The glance configuration options have been improved with
    detailed help texts, defaults for sample configuration
    files, explicit choices of values for operators to
    choose from, and a strict range defined with ``min`` and
    ``max`` boundaries.

    * It must be noted that the configuration options that
      take integer values now have a strict range defined
      with ``min`` and/or ``max`` boundaries where
      appropriate.
    * This renders the configuration options incapable of
      taking certain values that may have been accepted
      before but were actually invalid.
    * For example, configuration options specifying counts,
      where a negative value was undefined, would have still
      accepted the supplied negative value. Such options
      will no longer accept negative values.
    * Options where a negative value was previously defined
      (for example, -1 to mean unlimited) will remain
      unaffected by this change.
    * Values which do not comply with the new restrictions
      will prevent the service from starting. The logs will
      contain a message indicating the problematic
      configuration option and the reason why the supplied
      value has been rejected.