Fix SPEC documentation to say subclasses are allowed
Fix SPEC documentation to say subclasses are allowed

rwz/rack,gfvcastro/rack,tylergannon/rack,davidcelis/rack,wjordan/rack,keithduncan/rack,wjordan/rack,paulrogers/rack,gioele/rack,supzann3/rack,shaneog/rack,ganmacs/rack,krainboltgreene/lack,imtayadeway/rack,tricknotes/rack,fabianrbz/rack,ngpestelos/rack,stepri/rack,deepj/rack,trexnix/rack,laplaceliu/rack,evanphx/rack,getaroom/rack,maclover7/rack,rwz/rack,sigmavirus24/rack,travis-repos/rack,Eric-Guo/rack,arronmabrey/rack,eins78/rack,eavgerinos/rack,chneukirchen/rack,keepcosmos/rack,AMekss/rack,fabianrbz/rack,gioele/rack,eins78/rack,Eric-Guo/rack,x-team/rack-cgmasters,joevandyk/rack,davidcelis/rack,stepri/rack,akihiro17/rack,akihiro17/rack,davidcelis/rack,wildjcrt/rack,arronmabrey/rack,keithduncan/rack,eavgerinos/rack,laplaceliu/rack,jackxxu/rack,Comcast/rack,jackxxu/rack,wjordan/rack,davydovanton/rack,AMekss/rack,getaroom/rack,ganmacs/rack,jackxxu/rack,rkh/rack,davydovanton/rack,getaroom/rack,tricknotes/rack,jeremyf/rack,chneukirchen/rack,stepri/rack,eavgerinos/rack,jeremyf/rack,laplaceliu/rack,Codeman655/rack,Comcast/rack,keepcosmos/rack,sigmavirus24/rack,chneukirchen/rack,akihiro17/rack,gfvcastro/rack,ktheory/rack,Codeman655/rack,Eric-Guo/rack,ktheory/rack,trexnix/rack,rkh/rack,zjsxwc/rack,keithduncan/rack,eins78/rack,tylergannon/rack,imtayadeway/rack,zjsxwc/rack,ngpestelos/rack,maclover7/rack,sigmavirus24/rack,davydovanton/rack,ganmacs/rack,ngpestelos/rack,fabianrbz/rack,nmk/rack,keepcosmos/rack,lgierth/rack,liamseanbrady/rack,Codeman655/rack,maclover7/rack,evanphx/rack,liamseanbrady/rack,nmk/rack,wildjcrt/rack,supzann3/rack,deepj/rack,jeremyf/rack,gioele/rack,shaneog/rack,wildjcrt/rack,trexnix/rack,shaneog/rack,tylergannon/rack,liamseanbrady/rack,jhodder/rack,AMekss/rack,imtayadeway/rack,deepj/rack,zjsxwc/rack,supzann3/rack,gfvcastro/rack,evanphx/rack,Comcast/rack,nmk/rack,rwz/rack,arronmabrey/rack