astakos oa2: Early failure in case of conflicting client information.
Catch earlier requests containing conflicting client identification(client_id) and client authorization (authorization header).
astakos oa2: Fix request authorisation code failures due to unicode issue
If the object to be urlencoded has its own urlencode() method,use this instead.
Refs: #4971
astakos oa2: Set a redirect URI length limit.
This limit is configurable and is applied in the api level.
Refs: #4804
astakos: More logging fixes
astakos: Fix logging issue
astakos oa2: Add copyright notes
astakos oa2: rename settings and url prefixes
Change setting and url prefixes from `oa2` to`oauth2`
astakos: Minor improvements in validate token api call
Add tests for validate access token endpoint
astakos: Configure oa2 app
astakos: Minor changes in oa2 app
astakos: oa2 app
astakos: Extend oa2 app