status/report-template.xml: Improve Documentation category description

[salvadore]

Summary

According to its description, the Documentation category includes only the doc tree and external documentation. This commit explicitly adds manpages, so that reports involving manpages in the base or ports tree can also be categorized under Documentation. While here, also adds the possibilty to include reports modifying existing external documentation.

[salvadore]

Also include the possibility to include reports modifying existing external documentation.

[bcr]

Oxford comma, the rest is fine.

head/en_US.ISO8859-1/htdocs/news/status/report-template.xml

110–111

s/manpages/manpages,/

[salvadore]

Oxford comma added. Thanks!

[gerald]

Obviously okay with me (as your mentor) once a doc committer approves.

[bcr]

OK, thank you. Approved!