Remove double URL encoding
Remove double URL encoding

ZipStreamer as bundled with 9.0 will properly encode the filename already.

Fixes https://github.com/owncloud/core/issues/22836#issuecomment-193336245

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