Fix empty <dd> issues and alignment of information in <dl>s

On Firefox 19 using the XO sytle, empty <dd> blocks collapse into
nothing, and lower ones reflow upwards, including <br/> blocks.

Remove <br/>s from the middle of <dl> blocks and split into seperate
<dl> blocks to limit the effect of the reflowing.

Insert &nbsp;s into the PIF list to prevent the empty <dd> blocks from
reflowing together, allowing the IP addreses to match up with their
correct PIF.