Sometimes, you might want to override a normally-generic section in one of
your modules. This section plugin replaces the preceding section with the
corresponding section taken from your POD (if it exists). If your POD
doesn't contain a matching section, then the Pod::Weaver-provided one will
be used.

Both the original section in your POD and the section provided by
Pod::Weaver must match the 'header_re'. Also, this plugin must immediately
follow the section you want to replace (unless you set 'match_anywhere' to
a true value).

It's a similar idea to the Pod::Weaver::Role::SectionReplacer manpage,
except that it works the other way around. SectionReplacer replaces the
section from your POD with a section provided by Pod::Weaver.