nit in scan.bro

line 35 of scan.bro:

  const addl_web = { 81/tcp, 443/tcp, 8000/tcp, 8001/tcp, 8080/tcp, } &redef;

  unless i'm confused the first one should be 80/tcp, no?

  also, vern, do you want documentation submissions? i was going to fill in
  the sections about Building and Installing Bro (2.1.1) and Running Bro on
  network traffic (2.1.3). i noticed the source for the docs isn't included,
  so i can't make patches.