The legal-1osso* busybox version suffix has been there since chinook at least, no idea why.
busybox (3:1.6.1.legal-1osso3) unstable; urgency=low * Legal cleanups. Fixes: NB#66440 <-- -- Yauheni Kaliuta <yauheni.kaliuta@nokia.com> Fri, 24 Aug 2007 13:48:40 +0300 busybox (3:1.6.1-1osso2) unstable; urgency=low * 07tar-spaces.dpatch added -- Yauheni Kaliuta <yauheni.kaliuta@nokia.com> Fri, 27 Jul 2007 20:01:58 +0300