It's a proprietary package installed in /sbin; the license indication if fishy (as-is?). I'm opening this bug to not forget about it.
Related software, in net-dialup/fc* says LICENSE="AVM-FC" which contains the following clause: "You may not transmit, reproduce or alter this Software in whole or in part, in any form, by any means, [...]" Does this imply that we need to mirror restrict these packages?
+ 12 Jan 2012; Ulrich Mueller <ulm@gentoo.org> drdsl-1.2.0.ebuild: + Correct LICENSE to AVM-FC and add mirror restriction, bug 339118.