Read version and product name from update template

Download the current public folder only

update script for new server-to-server sharing

[encryption] fix download of public shared files

The files_external app might need the password so autologin must be disabled

adapt decrypt all to the new folder structure

During upgrade, the config settings aren't always available due to
base.php changes. This fix makes the update info page read the product
name and version from the update template, which already had them.

From within a shared/public directory, when drilling down folders, some
users want to be able to download what they're currently looking at, not
the whole shared folder. The whole archive is always a click away anyway
since a user can click on the home button.

Get rid of `stripslashes()`

Fix annotations in file view

This conversions are actually totally unneeded and probably left-overs from ages where the safe_mode was still a valid thing.

set accept to 1 (=true) for all server-to-server shares on update, at this point in time all shares are created by the first version of server-to-server sharing and are accepted if they were added to the table

Fix PHP doc and enforce type

drop dead code - ref #13301

Fix Basic Auth in master for applications

Fix searchCommon to properly match path name

add https:// placeholder for From Link feature. closes #13255

adapt decrypt all and restore/delete key backups to the new folder structure for encryption key introduced with OC8

drop useless "!!! No reuse of etag" - fixes #13187

Use json_encode on string

It's better to encode the string to prevent possible (yet unknown) bugs in combination with PHP's type juggling.

Previously the boolean statements evaluated to either an empty string (false) or a not empty one (true, then it was 1). Not it always evaluates to false or true.

This also removes a stray - that was not intended there but shouldn't have produced any bugs. Just to increase readability.

Thanks @nickvergessen for spotting.

Addresses https://github.com/owncloud/core/pull/13235/files#r22852319

Use a special filter expression for Oracle to filter the prefix - fixes ...

usage of const in JS is supported in IE11+

Adding repair step to fix missing etags - fixes #12172

Properly update internal file info with updated tags

Check for the posix extension

don't show no files yet when mask is in place, fixes #13141

Check for the posix extension - refs https://github.com/owncloud/core/pull/13282#issuecomment-69602645