Custom parameters prefix knotx snippet

[malaskowski]

Description

Snippet parameters names are too long, because of being HTML5 compliant (as the snippet tag is <script>). Since Knot.x 1.2.1, it is possible to customize snippet tag name (see #385 for more details). This enchancment is followup of this discusion.

Motivation and Context

• snippet parameters should enable defining HTML compliant prefixes, but when not necessary should be simplified.

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• [x] My code follows the code style of this project.
• [x] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.

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[malaskowski]

@pun-ky thanks for this catch, of course it is not required. I've updated wiki with information about it. Good catch.