change db structure of calendar for sharing calendars
change db structure of calendar for sharing calendars

whitekiba/server,IljaN/core,bluelml/core,whitekiba/server,owncloud/core,xx621998xx/server,nextcloud/server,bluelml/core,cernbox/core,jbicha/server,endsguy/server,nextcloud/server,jbicha/server,lrytz/core,michaelletzgus/nextcloud-server,pixelipo/server,pmattern/server,bluelml/core,nextcloud/server,pixelipo/server,pixelipo/server,cernbox/core,pmattern/server,xx621998xx/server,lrytz/core,phil-davis/core,pixelipo/server,michaelletzgus/nextcloud-server,pmattern/server,cernbox/core,Ardinis/server,michaelletzgus/nextcloud-server,andreas-p/nextcloud-server,owncloud/core,owncloud/core,xx621998xx/server,Ardinis/server,xx621998xx/server,endsguy/server,jbicha/server,cernbox/core,pixelipo/server,lrytz/core,pollopolea/core,lrytz/core,andreas-p/nextcloud-server,endsguy/server,nextcloud/server,andreas-p/nextcloud-server,IljaN/core,endsguy/server,Ardinis/server,bluelml/core,endsguy/server,whitekiba/server,lrytz/core,whitekiba/server,owncloud/core,IljaN/core,pmattern/server,pollopolea/core,jbicha/server,Ardinis/server,sharidas/core,cernbox/core,pollopolea/core,owncloud/core,andreas-p/nextcloud-server,jbicha/server,pollopolea/core,michaelletzgus/nextcloud-server,xx621998xx/server,sharidas/core,IljaN/core,IljaN/core,Ardinis/server,sharidas/core,sharidas/core,bluelml/core,andreas-p/nextcloud-server,whitekiba/server,sharidas/core,pmattern/server,pollopolea/core