doc fix

[Clint Adams]

I see that the -h/-n inconsistencies have already been fixed in CVS.
-l is still missing from the SYNOPSIS.

Index: bogofilter.xml
===================================================================
RCS file: /cvsroot/bogofilter/bogofilter/bogofilter.xml,v
retrieving revision 1.4
diff -u -r1.4 bogofilter.xml
--- bogofilter.xml	18 Sep 2002 22:53:23 -0000	1.4
+++ bogofilter.xml	21 Sep 2002 07:07:17 -0000
@@ -21,6 +21,7 @@
   <arg choice='opt'>-p</arg>
   <arg choice='opt'>-d</arg>
   <arg choice='opt'>-v</arg>
+  <arg choice='opt'>-l</arg>
   <arg choice='opt'>-V</arg>
 </cmdsynopsis>