MINOR: backend: add hash-balance-factor option for hash-type consistent

0 will mean no balancing occurs; otherwise it represents the ratio
between the highest-loaded server and the average load, times 100 (i.e.
a value of 150 means a 1.5x ratio), assuming equal weights.

Signed-off-by: Andrew Rodland <andrewr@vimeo.com>
3 files changed