[io grant] Toss IO::Path.child-secure
[io grant] Toss IO::Path.child-secure

We'll make .child be .child-secure around 6.d time instead.

Discussion: https://irclog.perlgeek.de/perl6-dev/2017-04-17#i_14439386

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