Files: fix the order fileactions are computed for a file

Fixing #3095

Add markdown to mimetype list

Allow loading of external media ressources

- xframe restriction configurable now

fix wrong shared icon description

Fix for #3049

fix #2928

translation of string "Shared" has to be marked as located in "files" for the translation extractor

check if there is a default/ folder in the theme directory if no theme e...

Add JS redirect if that fails (HTTP-based redirects are disabled by
default in more recent Firefox versions).

Fix ugly error style on install

Disallow URLs containing a @

External Storage: Check for curl in PHP

LDAP: reset user/group-config association only after exists-check, may p...

Files: also check if the source path is valid when doing a rename or copy operation

If no curl is found, disable the storage that needs it.

By initializing the template engine first we can show the
'Can't write into config directory 'config'' error in a nice way instead
of plain unstyled HTML.

Fix raiseError call in the MDB2 sqlite3 driver

Improve error message if user creation fails during setup

Files: Fix XSS when creating dropshadow

Test if we want a 3rdparty style/script before checking the 3rdparty root