MPIR license change

[Jerry James]

The mpir package has changed from LGPLv2+ to LGPLv3+ in a new version
(2.5.1) being built for F18 and Rawhide.  The only current consumer of
MPIR is Macaulay2, and it is dropping use of MPIR in F18+, so this
change should have no consequences.
-- 
Jerry James
http://www.jamezone.org/