cherokee violates mtree

[ruipacheco (Rui Pacheco)]

$ sudo port install cherokee
--->  Computing dependencies for cherokee
--->  Fetching archive for cherokee
--->  Attempting to fetch cherokee-1.2.101_1.darwin_13.x86_64.tbz2 from http://packages.macports.org/cherokee
--->  Attempting to fetch cherokee-1.2.101_1.darwin_13.x86_64.tbz2 from http://lil.fr.packages.macports.org/cherokee
--->  Attempting to fetch cherokee-1.2.101_1.darwin_13.x86_64.tbz2 from http://nue.de.packages.macports.org/macports/packages/cherokee
--->  Fetching distfiles for cherokee
--->  Attempting to fetch cherokee-1.2.101.tar.gz from http://www.cherokee-project.com/download/1.2/1.2.101
--->  Attempting to fetch cherokee-1.2.101.tar.gz from http://fco.it.distfiles.macports.org/mirrors/macports-distfiles/cherokee
--->  Verifying checksums for cherokee                                               
--->  Extracting cherokee
--->  Configuring cherokee
--->  Building cherokee
--->  Staging cherokee into destroot
--->  Creating launchd control script
###########################################################
# A startup item has been generated that will aid in
# starting cherokee with launchd. It is disabled
# by default. Execute the following command to start it,
# and to cause it to launch at startup:
#
# sudo port load cherokee
###########################################################
Warning: violation by /Library/WebServer
Warning: cherokee 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 cherokee @1.2.101_1
--->  Activating cherokee @1.2.101_1
--->  Cleaning cherokee
--->  Updating database of binaries
--->  Scanning binaries for linking errors
--->  No broken files found.