Adds encryption middlewares.
All object servers and proxy servers should be upgraded before
introducing encryption middleware.
Encryption middleware should be first introduced with the
encryption middleware disable_encryption option set to True.
Once all proxies have encryption middleware installed this
option may be set to False (the default).
Increases constraints.py:MAX_HEADER_COUNT by 4 to allow for
headers generated by encryption-related middleware.
Co-Authored-By: Tim Burke <tim.burke@gmail.com>
Co-Authored-By: Christian Cachin <cca@zurich.ibm.com>
Co-Authored-By: Mahati Chamarthy <mahati.chamarthy@gmail.com>
Co-Authored-By: Peter Chng <pchng@ca.ibm.com>
Co-Authored-By: Alistair Coles <alistair.coles@hpe.com>
Co-Authored-By: Jonathan Hinson <jlhinson@us.ibm.com>
Co-Authored-By: Hamdi Roumani <roumani@ca.ibm.com>
UpgradeImpact
Change-Id: Ie6db22697ceb1021baaa6bddcf8e41ae3acb5376
96a0e07753