Yes, "NL" means "LF" to Tor.

svn:r17192

doc/spec/dir-spec.txt

@@ -213,6 +213,7 @@ $Id$
 
   More formally:
 
+    NL = The ascii LF character (hex value 0x0a).
     Document ::= (Item | NL)+
     Item ::= KeywordLine Object*
     KeywordLine ::= Keyword NL | Keyword WS ArgumentChar+ NL