<filename role="package">. The <port> tag as it was had two major
defects: (a) the name is ambiguous (does "port" mean "architecture"?
how about "TCP/UDP port"?), and (b) it introduces a non-standard (to
DocBook) tag, which is generally assumed to be evil.
Moral support by: bmah, keramida, mwlucas, roam
being rendered any differently than <username>, but it's very
confusing to write markup with both user and group names in close
proximity, and both marked up with <username>.