Adding lldp.json to the simulator

Moving the global on/off onto the LLDP page

Building a table of LLDP status from the S ports. Later on, if
we wish to implement an lldp receiver we can display the remote
details here

Adding support to the cmd parser for the lldp commands

httpd/page_impl.h

@@ -23,6 +23,7 @@ void send_config(void);
 void send_cmd_log(void);
 void send_lag(void);
 void send_stp(void);
+void send_lldp(void);
 void send_vlanlist(void);
 
 /*  Convert only the lower nibble to ascii HEX char.