Revert "Use $*SPEC.dir-sep in p6doc-index"
Revert "Use $*SPEC.dir-sep in p6doc-index"

This reverts commit 2bc55d8ba075ce9671ed0ecfa535629956040c5c.
Must check first why travis-ci buid failed

MadcapJake/doc,jonathanstowe/doc,MasterDuke17/doc,gfldex/doc,gfldex/doc,antquinonez/doc,jonathanstowe/doc,dha/doc,antquinonez/doc,perl6/doc,dmaestro/doc,perl6/doc,dmaestro/doc,perl6/doc,antquinonez/doc,dha/doc,dmaestro/doc,MadcapJake/doc,dmaestro/doc,tbrowder/doc,stmuk/doc,gfldex/doc,MadcapJake/doc,jonathanstowe/doc,jonathanstowe/doc,stmuk/doc,MadcapJake/doc,MasterDuke17/doc,MadcapJake/doc,stmuk/doc,dha/doc,stmuk/doc,tbrowder/doc,tbrowder/doc,antquinonez/doc,perl6/doc,antquinonez/doc,dha/doc,dha/doc,dmaestro/doc,MasterDuke17/doc,gfldex/doc,stmuk/doc,MasterDuke17/doc,jonathanstowe/doc,tbrowder/doc,gfldex/doc,perl6/doc