transmission: revert version back to 4.0.5

transmission: revert version back to 4.0.5

- Revert back from 4.0.6 to 4.0.5 due to a bug in 4.0.6 that has resulted in a variety
   of torrent mirrors banning transmission-4.0.6
- The update from 4.0.5 to 4.0.6 did not have any security fixes in it so there is no
   issue in moving backward to 4.0.5
- A fix has been created but it is unclear when (and if) version 4.0.7 will be released.
   The fix has also been included in version 4.1.0 but this is still in beta development
   form.
- Version 4.0.6 required minupnpc for building and run time. This reversion is also
   removing miniupnpc in an associated patch in this patch set.
- No change required in the rootfile.

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Reviewed-by: Michael Tremer <michael.tremer@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>