Even more security hinting

[Moritz Muehlenhoff <jmm@inutil.org>]

- kadu/0.6.0.2-3 seems to need a give back on arm, it's in "Building"
  status for several days now.

- Likewise for gnutls/2.4.2-3 on mipsel.

- trac/0.11.1-2.1 needs an unblock

Cheers,
        Moritz