Fix nsedoc issues (missing ---, mostly)

Originally committed by dmiller but recommitted by david after recovery
from backup.

scripts/http-git.nse

@@ -12,6 +12,7 @@ possible, including language/framework, remotes, last commit
 message, and repository description.
 ]]
 
+---
 -- @output
 -- PORT   STATE SERVICE REASON
 -- 80/tcp open  http    syn-ack