Re-allow Inf as an argument to .recv.
Re-allow Inf as an argument to .recv.

This got broken in recent refactoring, and the module ecosytem was
relying on it.

labster/rakudo,tbrowder/rakudo,salortiz/rakudo,jonathanstowe/rakudo,Gnouc/rakudo,nbrown/rakudo,raydiak/rakudo,tbrowder/rakudo,tony-o/rakudo,labster/rakudo,salortiz/rakudo,MasterDuke17/rakudo,salortiz/rakudo,jonathanstowe/rakudo,raydiak/rakudo,sjn/rakudo,jonathanstowe/rakudo,lucasbuchala/rakudo,tony-o/rakudo,sjn/rakudo,lucasbuchala/rakudo,softmoth/rakudo,awwaiid/rakudo,awwaiid/rakudo,awwaiid/rakudo,Gnouc/rakudo,MasterDuke17/rakudo,labster/rakudo,Gnouc/rakudo,tbrowder/rakudo,tony-o/rakudo,nbrown/rakudo,sjn/rakudo,jonathanstowe/rakudo,usev6/rakudo,nbrown/rakudo,raydiak/rakudo,usev6/rakudo,tony-o/rakudo,rakudo/rakudo,usev6/rakudo,rakudo/rakudo,rakudo/rakudo,MasterDuke17/rakudo,sjn/rakudo,tbrowder/rakudo,MasterDuke17/rakudo,softmoth/rakudo,softmoth/rakudo,salortiz/rakudo,lucasbuchala/rakudo,raydiak/rakudo,salortiz/rakudo,usev6/rakudo,jonathanstowe/rakudo,usev6/rakudo,labster/rakudo,lucasbuchala/rakudo,rakudo/rakudo,awwaiid/rakudo,Gnouc/rakudo,awwaiid/rakudo,tony-o/rakudo,nbrown/rakudo,sjn/rakudo,labster/rakudo,Gnouc/rakudo,tbrowder/rakudo,softmoth/rakudo,labster/rakudo,tony-o/rakudo,salortiz/rakudo,softmoth/rakudo,MasterDuke17/rakudo,rakudo/rakudo,Gnouc/rakudo,rakudo/rakudo,MasterDuke17/rakudo,tbrowder/rakudo,nbrown/rakudo,lucasbuchala/rakudo,nbrown/rakudo