FreeBSD guide add howto bind to low ports

plz add in the guide how to bind to low ports (e. g. 80 and 443)

(I'm not in your target group (moving from linux to bsd for diversity) and new to bsd)
I managed it with: sysctl net.inet.ip.portrange.reservedhigh=0

also maybe give a hint that the keys are stored under: /var/db/tor
to save people time searching for them (especially since we got an offline master key feature)

tnx
