o Nmap now saves the target name (if any) specified on the command

line, since this can differ from the reverse DNS results.  It can be
  particularly important when doing HTTP tests against virtual hosts.
  The data can be accessed from target->HostName() from Nmap proper
  and host.targetname from NSE scripts.  The NSE HTTP library now uses
  this for the Host header.  Thanks to Sven Klemm for adding this
  useful feature.

Target.h

@@ -176,6 +176,16 @@ class Target {
   /* This next version returns a STATIC buffer -- so no concurrency */
   const char *NameIP();
 
+  /* Give the name from the last setTargetName() call, which is the 
+   name of the target given on the command line if it's a named
+   host. */
+  const char *TargetName() { return targetname; }
+  /* You can set to NULL to erase a name.  The targetname is blown
+     away when you setTargetSockAddr(), so make sure you do these in proper
+     order
+  */
+  void setTargetName(char *name);
+
   /* If the host is directly connected on a network, set and retrieve
      that information here.  directlyConnected() will abort if it hasn't
      been set yet.  */
@@ -246,6 +256,7 @@ class Target {
   unsigned int flags; /* HOST_UP, HOST_DOWN, HOST_FIREWALLED, HOST_BROADCAST (instead of HOST_BROADCAST use wierd_responses */
   struct timeout_info to;
   char *hostname; // Null if unable to resolve or unset
+  char * targetname; // The name of the target host given on the commmand line if it is a named host
 
 #ifndef NOLUA
   ScriptResults scriptResults;