PacketMan@ Even though I think it was poor form that you didn't even attempt to rebuild synth after explicit instructions (even after saying you wanted to "learn" FreeBSD), I'm going to remove any excuse you could have with disabling the watchdog. I spent my time to create 1-line patch for you.
cd /usr/ports/ports-mgmt/synth
mkdir files
cd files
fetch http://muscles.dragonflybsd.org/misc/patch-src_portscan-buildcycle.adb
- rebuild and reinstall synth