Add unique key info in slave proto (#858)#862

Merged

sre-bot merged 2 commits intopingcap:release-3.0from july2993:add_uk_3.0

Jan 5, 2020

+150-20

Commits on Dec 30, 2019

Add unique key info in slave proto (pingcap#858 )
july2993
committed

Commits on Jan 5, 2020

Update parser
july2993
committed