Incorrect / inconsistent documentation: disable_host_node_id

#### Feature Description

Not a feature request, but not a bug either. I'd assume this is the "less urgent" channel.

Configuration for `disable_host_node_id` is available from [CLI ](https://developer.hashicorp.com/consul/commands/agent#_disable_host_node_id) and from [configuration file](https://developer.hashicorp.com/consul/docs/reference/agent/configuration-file/node#_disable_host_node_id).

The configuration file documentation incorrectly state that the default value is `false`. According to the CLI docs, the default value has been changed to `true` since Consul 0.8.5.

#### Use Case(s)

noop

Compare the CLI documentation and configuration-file documentation linked in the issue for disable_host_node_id, starting with their stated default values. Update the configuration-file documentation to match the CLI documentation, then verify that both references consistently state the intended default.

Written by the indexing model from the issue text.