[RESULT][VOTE] Release Apache Knox 2.1.1 - RC 4

[Tamás Hanicz]

 The VOTE for 2.1.1 RC 4 passes with: 4 binding +1's and 0 -1's.

I will be working on promoting 2.1.1 RC 4 to an official release shortly.

Thank you for taking the time to test this release and contributing to the
Apache Knox community!