Merge pull request cannatag#971 from cannatag/update-changenotes

Updated the changelog for v2.9.1

Added configuration for testing against Windows AD 2019 running on an…

… Azure instance.

Added user credentials, ous, etc. for an AD 2019 configuration that's accessible from
the public internet.
Added some extra detail for failed user_add calls, to make debugging any failures
easier, as in some cases the only error printed was the downstream error encountered
when deleting or modifying the user failed.

Also updated tests searching with a -2 filter to use -3 because -2019 is in the domain
name and caused problems.

check auto_range

test_server_type defaults to NONE

docs requirements.txt

message for prohibit modify opeations in new entry

Merge remote-tracking branch 'origin/dev' into dev

empty schema doesn't raise exception in objectDef

bind() is no more executed twice when auto_bind() == True

Merge pull request cannatag#519 from dirkjanm/dev

Fix duplicate controls