Re-initialize delay interval

In the default configuration, a port receiving a disable command followed immediately by a txonly, rxonly, or tx_rx command delays re-initializing for two seconds, during which LLDP operation remains disabled. If an active port is subjected to frequent toggling between the LLDP disabled and enabled states, LLDP advertisements are more frequently transmitted to the neighbor device. Also, the neighbor table in the adjacent device changes more frequently as it deletes, then replaces LLDP data for the affected port which, in turn, generates SNMP traps (if trap receivers and SNMP notification are configured.) All of this can unnecessarily increase network traffic. Extending the re-initialization-delay interval delays the ability of the port to re-initialize and generate LLDP traffic following an LLDP disable/enable cycle.