How to install secnet on a Fink-equipped OS X system:
  - Install GMP:
    fink install gmp
  - Download and install ADNS:
    ./configure --disable-dynamic
    make
    sudo make install
  - Build secnet:
    ./configure CPPFLAGS=-I/sw/include LDFLAGS=-L/sw/lib
    make
    sudo make install
  - Install tuntap for OSX from http://tuntaposx.sourceforge.net/
  - Create /etc/secnet/{key,secnet.conf,sites.conf} as usual
  - If you don't want secnet 'always on', edit
    uk.org.greenend.secnet.plist and remove *both* these two lines:
        <key>RunAtLoad</key>
        <true/>
  - Create the 'secnet' user and install the job configuration:
    ./setup.mac.

To start secnet:
  sudo launchctl start uk.org.greenend.secnet

To stop secnet:
  sudo launchctl stop uk.org.greenend.secnet

To uninstall:
  sudo launchctl unload uk.org.greenend.secnet
  sudo rm -f /Library/LaunchDaemons/uk.org.greenend.secnet.plist

Richard Kettlewell 2011-06-18