Log Message:
Update sysutils/consul to 0.7.4.

- agent: Integrated gopsutil library to use built in host UUID as node ID,
  if available, instead of a randomly generated UUID. This makes it easier
  for other applications on the same host to generate the same node ID
  without coordinating with Consul.
- agent: Added a configuration option, tls_min_version, for setting the
  minimum allowed TLS version used for the HTTP API and RPC.
- agent: Added a relay-factor option to keyring operations to allow nodes
  to relay their response through N randomly-chosen other nodes in the
  cluster.
- build: Consul is now built with Go 1.7.5.
- dns: Add ability to lookup Consul agents by either their Node ID or Node
  Name through the node interface (e.g. DNS (node-id|node-name).node.consul).
- dns: Fixed an issue where SRV lookups for services on a node registered
  with non-IP addresses were missing the CNAME record in the additional
  section of the response.