add 5226bis
set -> range
De-wordify abstract and intro
Move "why" to a subsection of "Creating a Registry"
tweak creation intro
Move documentation requirements up
Move 'existing registries' up
Move policies into their own top-level section.
remove Policy: prefix from section titles
Move registration status terms to their own section
tweak creating title again
Shorten revision title
reformat Documentation Requirements
reformat, massage
move 'selecting an appropriate registry policy' up
rearrange policy recommendations, append multiple policies
add blank lines to vspace
diddle with hang text presentation
Revise selecting a policy section.
rewrite overriding registration procedures