document the inversion stuff

Parse-Netstat-Colorizer/bin/cnetstat

@@ -17,13 +17,17 @@ sub help{
 	print '
 -a   All connections, including LISTENing ones.
 -c <cidrs>  A comma seperated list of CIDRs to search for.
+--ci   Invert the CIDRs saerch.
 --drp   Don\t resolve port names.
 -h   Print help info.
 -i   Invert the sort.
 -l   Equivalent of "-a -s listen". Can be combined with -s.
 -p <poorts>   A comma seperated list of ports to search for.
+--pi   Invert the port search.
 -P <protocols>   A comma seperated list of protocols to search for.
+--Pi   invert the protocol search.
 -s <states>   A comma seperated list of states to search for.
+--si   Incert the state search.
 -S <sort>   The sort method to use.
 -t   Don\'t fetch TCP connection information.
 -u   Don\'t fetch UDP connection information.
@@ -331,4 +335,22 @@ Display all connections listening explicitly on 192.168.15.2.
 
 Sort the connections by the foreign host and invert the results.
 
+    cnetstat -c 10.0.0.0/24 --ci
+
+Show connections that are either not locally or remotely part of the
+10.0.0.0/24 subnet.
+
+    cnetstat --ptr foo.bar
+
+Find connections to/from IPs that have a PTR record of foo.bar.
+
+    cnetstat --rptr foo
+
+Find connections to/from IPs that a PTR record that matches the regexp
+/foo/.
+
+    cnetstat --ptr foo.bar --ptri
+
+Find connections to/from IPs that do not have a PTR record of foo.bar.
+
 =cut