Basic authentication scheme is not case-insensitive

[eleftherias]

Actual Behavior

When http basic authentication is enabled and the Authorization header is prefixed with "BASIC" or "BaSiC" and contains a valid token, then the service responds with a 401 Unauthorized status.

Expected Behavior

When http basic authentication is enabled and the Authorization header is prefixed with "BASIC" or "BaSiC" and contains a valid token, then the service responds with a 200 OK status.