antinat 0.90_1 violates mtree with its manpages

[ryandesign@…]

$ sudo port install antinat
Password:
--->  Fetching antinat
--->  Attempting to fetch antinat-0.90.tar.bz2 from http://downloads.sourceforge.net/antinat
--->  Verifying checksum(s) for antinat
--->  Extracting antinat
--->  Configuring antinat
--->  Building antinat with target all
--->  Staging antinat into destroot
--->  Creating launchd control script
###########################################################
# A startup item has been generated that will aid in
# starting antinat with launchd. It is disabled
# by default. Execute the following command to start it,
# and to cause it to launch at startup:
#
# sudo launchctl load -w /Library/LaunchDaemons/org.macports.antinat.plist
###########################################################
Warning: violation by /opt/local/man
Warning: antinat violates the layout of the ports-filesystems!
Warning: Please fix or indicate this misbehavior (if it is intended), it will be an error in future releases!
--->  Installing antinat 0.90_1
--->  Activating antinat 0.90_1
--->  Cleaning antinat

[ryandesign@…]

Fixed in r28618, with maintainer's help.