Consistent use of line feeds on headlines.
Correct placement of VCL truth change.

During the last VDD I (hastily) added a note that the empty VCL truth
value changed between 3.0.2 and 3.0.3.

As Geoff found after digging into this (see varnish-misc@ yesterday),
this happened between 3.0.3 and 3.0.4.