b3270 hello Indication

### hello Indication

Initialization message. It is the first indication nested within the initialize element.

Attribute | Always present? | Purpose
--- | --- | ---
version | yes | Version number, e.g., 3.6.1
build | yes | Build string (timestamp)
copyright | yes | Copyright statement

Example:

    <hello version="3.6.1" build="b3270 v3.6alpha1 Mon May 30 10:06:18 CDT 2016 pdm" copyright="Copyright...">

b3270: Protocol - Operations - Indications