check only permission from link-share to decide if public upload is enabled or disabled
we can leave the loop if the permission of the link share was checked
add initial search in shared files
divide ids into chunks of 1k
return fixed path, skip shared files outside of 'files'
fix getAll(), refactor search by mime & search
add all results, sharing cache also returns entries for shared files in external storages
same for search by mime
handle error situation of rename proper
fixing typo

Typo in comment "feature" => "future"
adding PHPDoc comments to getBackend
ensure getChildren() is called on an instance of Share_Backend_Collection
add blacklist to txt preview backend
adding privilege check on move and rename operations
add test data for cal and contact preview
Merge pull request #4963 from cyberb/patch-1

fixing typo
User: move checkPassword from User to Manager to not break API
=== not ==
adding file_exists check just to be on the save side
duplicate code :sigh: - will fix this in a second pr
Fix return value from User object to User ID