Concurrency control documentation improvements
Concurrency control documentation improvements

yanyanqin/eve,kidaa/eve,EasonYi/eve,hustlzp/eve,julianhille/eve,mcreenan/eve,kalbasit/eve,elpoisterio/eve,eduardomb/eve,opticode/eve,superdesk/eve,pjs7678/eve,matthieuprat/eve,stratosgear/eve,mugurrus/eve,amagdas/eve,bcrochet/eve,jzorrof/eve,sebest/eve