add a couple examples..

vlanmang.py

@@ -44,6 +44,11 @@ class SwitchConfig(object):
 	    pysnmp.hlapi.UsmUserData object, either of which can write to the
 	    necessary MIBs to configure the VLANs of the switch.
 
+            Example for SNMPv3 where the key for both authentication and
+	    encryption are the same:
+            UsmUserData('username', key, key, authProtocol=usmHMACSHAAuthProtocol,
+                       privProtocol=usmDESPrivProtocol)
+
 	vlanconf -- This is a dictionary w/ vlans as the key.  Each value has
 	    a dictionary that contains keys, 'u' or 't', each of which
 	    contains the port that traffic should be sent untagged ('u') or
@@ -53,6 +58,20 @@ class SwitchConfig(object):
 	    index number, or it can be a string, which will be looked up via
 	    the IF-MIB::ifName table.
 
+	    Example specifies that VLANs 1 and 2 will be transmitted as tagged
+	    packets on the port named 'lag1'.  That ports 1, 2, 3, 4 and 5 will
+	    be untagged on VLAN 1, and ports 6, 7, 8 and 9 will be untagged on
+	    VLAN 2:
+	    { 1: {
+	        'u': [ 1, 2, 3, 4, 5 ],
+	        't': [ 'lag1' ],
+	      },
+	      2: {
+	        'u': [ 6, 7, 8, 9 ],
+	        't': [ 'lag1' ],
+	      },
+	    }
+
 	ignports -- Ports that will be ignored and not required to be
 	    configured.  List any ports that will not be active here, such as
 	    any unused lag ports.