Auto merge of #2456 - jespino:remove-deprecated-code, r=alexcrichton
Auto merge of #2456 - jespino:remove-deprecated-code, r=alexcrichton

Remove deprecated usage of SliceConcatExt::connect

I think this can be changed to .join (the deprecation was in the 1.3 version)

nipunn1313/cargo,tshepang/cargo,brson/cargo,sbeckeriv/cargo,tshepang/cargo,AndiDog/cargo,durka/cargo,rust-lang/cargo,brson/cargo,nipunn1313/cargo,durka/cargo,blaenk/cargo,blaenk/cargo,tsurai/cargo,brson/cargo,vojtechkral/cargo,nipunn1313/cargo,achanda/cargo,tsurai/cargo,eminence/cargo,blaenk/cargo,brson/cargo,rust-lang/cargo,ThinTim/cargo,ThinTim/cargo,AndiDog/cargo,mark-buer/cargo,blaenk/cargo,AndiDog/cargo,mark-buer/cargo,rustyhorde/cargo,mark-buer/cargo,achanda/cargo,rustyhorde/cargo,eminence/cargo,mark-buer/cargo,tshepang/cargo,tsurai/cargo,rust-lang/cargo,ThinTim/cargo,eminence/cargo,AndiDog/cargo,vojtechkral/cargo,ThinTim/cargo,tsurai/cargo,durka/cargo,eminence/cargo,rust-lang/cargo,achanda/cargo,sbeckeriv/cargo,rustyhorde/cargo,sbeckeriv/cargo,brson/cargo,durka/cargo,rustyhorde/cargo,ThinTim/cargo,achanda/cargo,tshepang/cargo,mark-buer/cargo,vojtechkral/cargo,nipunn1313/cargo,AndiDog/cargo,blaenk/cargo,vojtechkral/cargo,sbeckeriv/cargo,tsurai/cargo