Moves `source-type` to a footnote refs #2543
Moves `source-type` to a footnote refs #2543

perl6/doc,MasterDuke17/doc,MasterDuke17/doc,tbrowder/doc,MasterDuke17/doc,tbrowder/doc,perl6/doc,tbrowder/doc,perl6/doc,perl6/doc,MasterDuke17/doc,tbrowder/doc,perl6/doc