The cache isn't cleared properly because unlink() doesn't remove the
cache entry which caused side-effects when reusing the same file name
(which randomly happens when time() returns the same value)

This fix first makes sure the unit tests don't fail any more.
The unlink() case with the cache will be investigated separately.

Load a separate config (if present) when running unit tests

Reuse the data retrieved from the cache in checkUpdate

When reading the size of "files" mountpoints need to be excluded

Quote column names on adding description

The versions and trashbin app are now passing "includeMountPoints=false"
to "getFileInfo()" to make sure that the calculated total size doesn't
include mount points like Shared or external storage.

This is because the default call (legacy) used to return the size of
mount points as well.

Fixes #6731

Fixed quota wrapper to not wrap failed fopen streams

Fix 6730

Fix internet detection to use OC_Util::getUrlContent

When calling fopen() on some storage types, these return false instead
of throwing an exception.

This fix makes sure that in case the stream wasn't opened (for example
when a file doesn't exist any more) the stream isn't wrapped.

Also added 'rb' as another case that doesn't need to be wrapped.

Fixes #6832

Fixed isPreviewAvailable warnings in log

Added SVG fallback to apps settings popup

Fix activation of unknown apps

Allow app developers to add documentation links to the appinfo

Fix array access syntax for older PHP

isPreviewAvailable wasn't always set as the files formatting code is
slightly different than the one from the files app.

Fixes #6423

webdav: return SPACE_UNKNOWN if server do not support quota

updated description of the files encryption app

There was a syntax error when running tests in PHP 5.3.10.

Signed-off-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>

Fix to not destroy draggable when no draggable was set

Fix untranslated text when deleting user

\OCP\Share::unshareAll() fix

This should fix issue #6728

Fixed Dropbox/Google storage async save call