Do not lower the sharee search
Do not lower the sharee search

Fixes #21639

When lowering the remote search it break remotes that have uppercase
letters like foo@example.com/ownCloud/

Backends do the mathcing so they should also make sure that the search
string is converted to the format they require.

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