regdb: fix moinmoin plugin license
regdb: fix moinmoin plugin license

Ben Hutchings told me that Debian found that the license statements
don't match, it says GPL but the top-level LICENSE file is ISC. It
doesn't really matter to me, so change the license here to ISC.

Signed-off-by: Johannes Berg <8398eb9892c5ab2ff439ca0b5e4b0706dd9ebef9@sipsolutions.net>
Signed-off-by: John W. Linville <2a53bac7a5d324865ef46ec4c38b2c0fba1456b4@tuxdriver.com>

0x90/wireless-regdb,CTU-IIG/802.11p-wireless-regdb,perillamint/wireless-regdb-hx,Distrotech/wireless-regdb,vaginessa/wireless-regdb