Description

For Qbox-project/qbx_core#555, configure the message of the day to be the following by default:

Also configures service messages.
For example, with this service messages configuration:

[
    {
        "version": "",
        "content": "empty string: will never show up"
    },
    {
        "version": 1,
        "content": "number: will never show up"
    },
    {
        "version": {},
        "content": "empty object: will never show up"
    },
    {
        "version": [],
        "content": "empty array: will never show up"
    },
    {
        "version": true,
        "content": "true: will never show up"
    },
    {
        "version": false,
        "content": "false: will always show up"
    },
    {
        "version": null,
        "content": "null: will always show up"
    },
    {
        "content": "undefined: will always show up"
    },
    {
        "version": "1.",
        "content": "'1.': will show up for versions 1.x.x"
    },
    {
        "version": "1.20.",
        "content": "'1.20.': will show up for versions 1.20.x"
    },
    {
        "version": "1.20.1",
        "content": "'1.20.1': will show up for version 1.20.1"
    },
    {
        "version": "2.",
        "content": "'2.': will show up for versions 2.x.x"
    },
    {
        "version": ["1.19.", "1.20.1"],
        "content": [
            "['1.19.', '1.20.1']: will show up for versions 1.19.x and version 1.20.1,",
            "plus all of these support multiline!"
        ]
    }
]

You get this result:

Checklist

• I have personally loaded this code into an updated Qbox project and checked all of its functionality.
• My pull request fits the contribution guidelines & code conventions.