Update docs for 'etag_ignore_fields' setting.
Update docs for 'etag_ignore_fields' setting.

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