add additional (commented) options to restund.conf template

[rohan-wire]

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PR Submission Checklist for internal contributors

• The PR Title

  • conforms to the style of semantic commits messages¹ supported in Wire's Github Workflow²
  • contains a reference JIRA issue number like SQPIT-764
  • answers the question: If merged, this PR will: ... ³

• The PR Description

  • is free of optional paragraphs and you have filled the relevant parts to the best of your ability

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What's new in this PR?

Issues

/etc/restund.conf did not contain examples of all possible configuration statements. Part of FS-503 which didn't get included.

Solutions

All possible configuration statements now either have a default or are included in a comment out line in /etc/restund.conf

Needs releases with:

• GitHub link to other pull request

Testing

Can't really test until this is deployed in an environment. Chicken and egg problem.

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PR Post Submission Checklist for internal contributors (Optional)

• Wire's Github Workflow has automatically linked the PR to a JIRA issue

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PR Post Merge Checklist for internal contributors

• If any sort of configuration variable was introduced by this PR, it has been added to the relevant documents and the CI jobs have been updated.

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References

1. https://sparkbox.com/foundry/semantic_commit_messages
2. https://github.com/wireapp/.github#usage
3. E.g. feat(conversation-list): Sort conversations by most emojis in the title #SQPIT-764.

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