A657          ; valid                                  # 5.1  CYRILLIC SMALL LETTER IOTIFIED A
A658          ; mapped                 ; A659          # 5.1  CYRILLIC CAPITAL LETTER CLOSED LITTLE YUS
A659          ; valid                                  # 5.1  CYRILLIC SMALL LETTER CLOSED LITTLE YUS
A65A          ; mapped                 ; A65B          # 5.1  CYRILLIC CAPITAL LETTER BLENDED YUS

- Apiserver add a new flag --goaway-chance which is the fraction of requests that will be closed gracefully(GOAWAY) to prevent HTTP/2 clients from getting stuck on a single apiserver. 
  After the connection closed(received GOAWAY), the client's other in-flight requests won't be affected, and the client will reconnect. 

&:-moz-focusring {\n    color: transparent;\n    text-shadow: 0 0 0 $input-color;\n  }\n\n  &:focus::-ms-value {\n    // Suppress the nested default white text on blue background highlight given to\n    // the selected option text when the (still closed) <select> receives focus\n    // in IE and (under certain conditions) Edge, as it looks bad and cannot be made to\n    // match the appearance of the native widget.\n    // See https://github.com/twbs/bootstrap/issues/19398.\n    color: $input-color;\n...