Change fibrechannel readme to emphasis sysctl settings importance

fibrechannel/README.mkdn

@@ -13,8 +13,7 @@ This is gmond python module that allows SNMP polling of Fibrechannel switches to
   * Save the fibrechannel.pyconf into directory and update the switch(s) name & IP's
   * Save the fibrechannel.py into your ganglia python module dir eg:  /usr/lib/ganglia/python_modules
   * Update SNMP community / ports if necessary
-
-If you're handling a large number of metrics, you may wish to set your sysctl settings as below:
+  * If FC metrics aren't appearing increase your net.core.rmem_max and default settings as below:
 
 net.core.rmem_max=104857600
 net.core.rmem_default=104857600