Added two hooks: pre_unshare and pre_unshareAll, useful for files_encryption
Added two hooks: pre_unshare and pre_unshareAll, useful for files_encryption

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