This is to be consistent with other manuals:
- no period punctuation at end
- no capitalization at beginning unless acronym or proper noun
- and no simple article (like "A") to start sentence.
While the docbook specification says refpurpose is a "one sentence",
its examples show it with the rules shown above.
Also compared with many manpages as this is common format for the
.Nd macro's one line description.
determine which DS records should be published
in the parent zone, or which DLV records should be
published in a DLV zone, and queries the DNS to
ensure that it exists. (Note: This tool depends
on python; it will not be built or installed on
systems that do not have a python interpreter.)
[RT #28099]
