Change HTML <style> elements as appropriate for a draft TS. Remove N3505 proposal portions not applicable to a draft TS. Add title, copyright, and indication of draft status.
Frontmatter work-in-progress.
Change "ISO/IEC/IEEE 9945" to "POSIX"
Final front-matter tweaks before attacking headings.
Remove <ins>...</ins>
Supply <h3> headings for the operational functions.
Remove outdated table of contents. Supply some missing anchors.
Add updated table of contents.