document that multiple clients can backup to a single remote
document that multiple clients can backup to a single remote

answer comes from author here: http://librelist.com/browser//attic/2014/11/11/backing-up-multiple-servers-into-a-single-repository/#e96345aa5a3469a87786675d65da492b

this should address the last remaining issue in #60

raxenak/borg,edgewood/borg,RonnyPfannschmidt/borg,edgimar/borg,mhubig/borg,edgewood/borg,edgimar/borg,level323/borg,mhubig/borg,edgimar/borg,raxenak/borg,ionelmc/borg,RonnyPfannschmidt/borg,edgimar/borg,level323/borg,raxenak/borg,raxenak/borg,RonnyPfannschmidt/borg,RonnyPfannschmidt/borg,ionelmc/borg,mhubig/borg,edgewood/borg,level323/borg,RonnyPfannschmidt/borg,ionelmc/borg,edgewood/borg