adjust list of errors, more compact and readable

Fix totally broken AppStore code...

[sqlite] Use an atomic implementation on sqlite for insertIfNotExist() + use it in the file cache ...

As it turned out the AppStore code was completely broken when it came from apps delivered from the appstore, this meant:

1. You could not disable and then re-enable an application that was installed from the AppStore. It simply failed hard.
2. You could not disable apps from the categories but only from the "Activated" page
3. It did not show the activation state from any category page

This code is completely static and thus testing it is impossible. We really have to stop with "let's add yet another feature in already existing static code". Such stuff has to get refactored first.

That said, this code works from what I can say when clicking around in the AppStore page GUI. However, it may easily be that it does not work with updates or whatsever as I have no chance to test that since the AppStore code is not open-source and it is impossible to write unit-tests for that.

Fixes https://github.com/owncloud/core/issues/14711

Refactor \OC\Memcache\Factory

Caches divided up into two groups: distributed and local. 'Low latency' is an
alias for local caches, while the standard `create()` call tries to get
distributed caches first, then local caches.

Memcache backend is set in `config.php`, with the keys `memcache.local` and
`memcache.distributed`. If not set, `memcache.distributed` defaults to the value
of `memcache.local`.

Make sure we use Jasmine 2 for running JS unit tests

Add --show-password option to ldap:show-config

Fix PHPDoc

That apparently went lost when changing the signature.

Add unit test for selection overlay actions in trashbin

Add a test for ObjectStore\NoopScanner

adding a windows smb config for testing to ci

Avatars in share dialog fixes

Since aa821ecc leading and trailing slashes are
trimmed in the file cache paths

Update scanFile() and scanChildren() to the new signature of the parent ...

Remove unnecessary backslashes from translations

Let users configure security headers in their Webserver

* Avatar for "xxxx share with you..." to the left
* Avatars for groups and remote shares (use default placeholder)
* Modified and added unit tests
* Use the same css for all the avatars in the dropdown

Jenkins #14650

We were using the SMB and SFTP backends, which since Icewind's new SMB library
results in an actual attempted connection just by constructing the storage.
This commit replaces all references to real storages (except when necessary)
with a dummy storage class.

use `dbtableprefix` for temp table and index names

Read from IRequest instead of reading twice