p2p: use curve25519.X25519() instead of ScalarMult() (#4449)
p2p: use curve25519.X25519() instead of ScalarMult() (#4449)

* p2p: use curve25519.X25519() instead of ScalarMult()

* Renamed array to shrKeyArray

* Updated CHANGELOG_PENDING

* Revert "Updated CHANGELOG_PENDING"

This reverts commit dbb72e0bf721287847ac136c99f385ce7456d1f7.

tendermint/tendermint,tendermint/tendermint,tendermint/tendermint,tendermint/tendermint