3.1.1 patch release

[Kengo Seki]

Hi everyone,

As reported in BIGTOP-3714, WebHDFS is broken in the 3.1.0 release by default.
It's a major problem for users though there's a workaround, so I'd
like to publish the 3.1.1 patch release.
Is it OK, and may I take a RM role?

Kengo Seki <sek...@apache.org>