Do not abort when meeting unfixable legacy storages

Adding a more meaningful message for sabre dav exception

Correct "one invalid characters" to "one invalid character"

Add an option to include the installed app version in "occ app:list"

display app update error messages

Use occ to install ownCloud in autotest.sh

Corrected "one invalid characters" to "one invalid character" in line 1575.

cron.php on cli has no time limitation - fixes #14481

Only rescan versions once in trashbin

update symphony components to 2.6.4

Clean-up code and use proper exception types

adding storage specific filename verification

Add support for 'child-src' directive

Log errors and create 404 in network list when a css or js is missing

Verify CSRF token already in update.php and not the EventSource code

Fix size propagation over shared storage boundary

Etc timezones don't exist for .5 and .75 offsets

Check whether the file id is valid, before using it to delete the previews