cyassl 2.6.0

Adjust configure arguments. The bump and fortress options are
application specific, and libz isn't standard DEFLATE behavior. Also
note that several of the enable options have changed case from the
earlier release of the library. This wasn't causing any problems due to
the bump and fortress options, but they are incorrect and needed
updating.

Closes #19553.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>