[release/5.0] ignore empty domain for digest auth #50598
Merged
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Backport of #50348 to release/5.0
Fixes #50283
/cc @wfurt
Customer Impact
This breaks Atlas MongoDB. As popular framework it has impact on wider user group.
While technically this is not regression in SocketHttpHandler as it never work before, option to use legacy handler was removed in 5.0 so there is no good solution.
The fix is small as our validation was too strict as RFC allows empty token but we failed to parse and reported as invalid.
Testing
Reported verified fix with daily 6.0 build. New test case was also added.
Risk
Small