Update .po files
Release 1.2.3
error: Add RESOURCE_NOT_AUTHORIZED error

This allows to distinguish normal read failures from read failures
where we miss authorization.
error: GST_RESOURCE_ERROR_NOT_AUTHORIZED will be available since 1.2.4
queue2: Fix merging of ranges

Make a method to get the seeking threshold. If data is further away from
this threshold we want to perform a seek upstream.
When the current downloaded range can merge with the next range,
actually include the data of the next range into the current range
instead of discarding it. Also decide if we seek to the write position
of the merged range or continue reading.
queue2: don't truncate the temp file on shutdown

We want to keep the downloaded file untruncated so that we can use it
again later.

Fixes: https://bugzilla.gnome.org/show_bug.cgi?id=724373