Since sorting was enabled permanenty the list would be resorted with
each inserted issue. When inserting thousands of ignored files that
would make the whole ui freeze up.

Instead, sorting is disabled for inserts now and is reenabled after some
time has passed. That way users usually see the sorted view without the
lockups. Also, there's now a maximum of 50k issue entries.

(cherry picked from commit 0f8790d9)

In particular before the capability call.

Also warn if no proxy is set because the command line doesn't follow the
strict format requirements.

(cherry picked from commit d0e7f61d)

- Clearly mark local and remote discovery start, to make this searchable
even without --logdebug.
- Promote two messages from debug to info: The 'N entries read from db'
message is useful and the 'read from db but ignored' message is rare
and surprising - if there's a bug there we want to see what happened in
the logs.

Sentry:
https://sentry.io/owncloud/desktop-win-and-mac/issues/427476987/

Sentry:
https://sentry.io/owncloud/desktop-win-and-mac/issues/425331770/

There's an upstream bug where QTextCodec::canEncode returns true even
though it should be false. This works around that issue and adds a test.

The original work was done in 72809ef5

See #6287, #5676, #5719
See https://bugreports.qt.io/browse/QTBUG-6925

deprecate suffix nightly, promote suffix daily

Issue #6303

There's a 64 character limit and we don't want to accidentally exceed
it.

Eventually there might be server API for default share name generation.

See owncloud/core#29913

Recent Qt version show way too many debug messages, spamming the console.
So filter only messages that comes from the client.

Also convert the others to the new syntax to avoid similar errors in the
future.

https://github.com/owncloud/enterprise/issues/2391

Qt's JSON API is confusing, it doesn't convert to a string as one expects.

QFileInfo::isSymLink() does detect reparse points that are symlinks but
returns false for junctions. The new function FileSystem::isJunction()
can detect those and is used to not recursively delete files inside
directories that are junctions.

See also https://bugreports.qt.io/browse/QTBUG-45344 and the
discussion in the PR https://codereview.qt-project.org/#/c/113019/.

The client already computed the valid permissions, there was just a typo
that meant we didn't end up using them.

Paths can contain the wildcards % and _ and that would lead to odd
behavior.

This patch also clarifies the behavior of avoidReadFromDbOnNextSync()
which previously dependend on whether "foo/bar" or "foo/bar/" was
passed as input.

Possibly affects #6322

Fix ownCloud icon in unbranded installer

The previous code would disable it when the second account was
configured.

See #6347

Update to upstream version '2.4.1+dfsg'
with Debian dir 25aea7b8477660b00c48913dacc339339b174ebb