Add Hot Spot Wait Times

[tsawyer]

This issue is to add a menu selection, or possibly incorporate with the hot spot COR LED menu selection, an asl-menu selection to enable near zero Tx unkey delay.

This stanza to set wait times very short already exists in rpt.conf

[wait-times_hd]
; Sample for half-duplex
telemwait = 100                     ; Time to wait before sending most telemetry
idwait = 100                        ; Time to wait before starting ID
unkeywait = 100                     ; Time to wait after unkey before sending CT's and link telemetry
calltermwait = 2000                 ; Time to wait before announcing "call terminated"

The menu selection would only add wait_times = wait-times_hd to the user node stanza.

Alternatively a menu selection could set duplex = 1, hangtime = 100, wait_times = wait-times_hd, and events = event-hs_led to the user node to build a one step creation of a configured hot spot.

[Allan-N]

Changes for "wait_times" and "hangtime" are being worked on in #46