p2p: fix comment in secret connection (#3348)
p2p: fix comment in secret connection (#3348)

Just a minor followup on the review if #3347: Fixes a comment. [#3347 (comment)](https://github.com/tendermint/tendermint/pull/3347#discussion_r259582330)
tendermint/tendermint,tendermint/tendermint,tendermint/tendermint,tendermint/tendermint