ftp: Add more information to info page

A recent change in the FTP door removed some logging from the pinboard. Some
information that could previously be glanced from the pinboard is now
inaccessible.

This patch adds a bit more information to the info output.

Target: trunk
Require-notes: yes
Require-book: no
Acked-by: Albert Rossi <arossi@fnal.gov>
Patch: http://rb.dcache.org/r/7004/