Bell Labs permitted UC Berkeley to fork and distribute Plan 9 under the GPL, but the main repository was still under the Lucent Public License or something weir

Bell Labs permitted UC Berkeley to fork and distribute Plan 9 under the GPL, but the main repository was still under the Lucent Public License or something weird like that. Relicensing under the MIT license will maximize the number of people who can use the code, even if the foundation they created does not catch on.