Updates policy: Clean up asciidoc conversion
Fix issues introduced by automated conversion to AsciiDoc, and update:
- Example packages for various update types restored (with links)
- Replace fedorahosted.org URLs and references to trac with Pagure links
- Link to HyperKitty for "devel list" mentions
- Some broken/lost wiki links restored
- Replace '[multiblock footnote omitted]' insertions with additional
references to labeled footnote
- Bold all remaining "SHOULD" "MUST" etc.
- Consistently capitalize "Bodhi"
- Make spelling, grammar, punctuation fixes