Add loopbreaker to Sandy Maguire's maintainership
Add loopbreaker to Sandy Maguire's maintainership

Fixes #4694
asr/stackage,jonschoning/stackage,athanclark/stackage,wereHamster/stackage,fimad/stackage,massysett/stackage,fpco/stackage,stackbuilders/stackage,michalkonecny/stackage,soenkehahn/stackage,spencerjanssen/stackage,clinty/stackage,iand675/stackage,Daniel-Diaz/stackage,simonmichael/stackage,mrkkrp/stackage