Fix Nmap DTD to account for PCDATA in script element

CHANGELOG

@@ -1,5 +1,9 @@
 # Nmap Changelog ($Id$); -*-text-*-
 
+o Fix Nmap's DTD, which did not recognize that the script element could contain
+  character data when a script returns a number or a boolean.
+  [Jonathan Daugherty]
+
 o [GH#75] Normalize check targets to standard format check-*.
   [Gioacchino Mazzurco]
 

docs/nmap.dtd

@@ -230,7 +230,7 @@
 
 <!ELEMENT cpe (#PCDATA)>
 
-<!ELEMENT script	(table|elem)* >
+<!ELEMENT script	(#PCDATA|table|elem)* >
 <!ATTLIST script	
 	id	CDATA	#REQUIRED
 	output	CDATA	#REQUIRED