The ebuild currently has LICENSE="as-is" which most likely is wrong. This is a binary package, and there is no license included in the tarball. Also I cannot find any info about distribution terms on the HOMEPAGE. Can you please ask upstream for clarification under with terms this package can be distributed?
dtrace is a binary only tool from AVM, which needs an AVM ISDN board. No special license included. It's basically a debug-tool for their cards.
it's from their FTP...
from the README: DTRACE.DYN / DTRACE.STATIC traces ISDN messages with AVM ISDN-controllers. DTRACE is a console application for Linux. The program uses manufacturer specific functions for tracing and does not work with ISDN cards from other manufacturers. Quit the program with ENTER. [..] 06/2004 AVM GmbH, Berlin
Mail to info@avm.de sent.
According to j.schoellhammer@avm.de the license can be found at the top of the following file: ftp://ftp.avm.de/fritz.box/license.txt I've added the English version as licenses/AVM-dtrace. Ebuild bumped to -r2, needs to be stabilised on x86.
@Ulrich Müller: please close that bug afterwards, thanks!
solved.