Bump PORTREVISION.

Move ${PREFIX}/share/nagios/sbin to ${PREFIX}/share/nagios/cgi-bin as that
is the location originally used by the nagios author.

Apache runs as user "www" now, so nagios the nagios socket should be owned by
"www" instead of nobody.

Submitted by: David Douthitt <n9ubh@callsign.net> via maintainer