According to README.txt, this is licensed as MIT (Expat), IBPP-1.1 and LGPL-2.1+. The text of IBPP-1.1 is attached to bug 444626.
+ 25 Nov 2012; Sergey Popov <pinkbyte@gentoo.org> flamerobin-0.9.2.ebuild: + Set proper license information, wrt bug #444628. Thanks to Ulrich Müller for + discovering this issue