This feature flag was always needed, and in some situations, tokio was
enabling that feature flag as well. With the new release of tokio 1.17,
the lack of this flag causes runtime errors because mio 0.7 doesn't have
the required flag as tokio is enabling it in 0.8.
When running tests locally, server_alpn_unset fails, but that happens regardless of this feature flag change.
Closes #1303
This feature flag was always needed, and in some situations, tokio was enabling that feature flag as well. With the new release of tokio 1.17, the lack of this flag causes runtime errors because mio 0.7 doesn't have the required flag as tokio is enabling it in 0.8.
When running tests locally, server_alpn_unset fails, but that happens regardless of this feature flag change.