Changes:
    * Implement patty_ax25_sock_timeR_ack_restart() to initialize the
      XID/SABM/SABME ack Timer T1
    * Implement patty_ax25_sock_timer_ack_cancel() to clear Timer T1
    * Implement patty_ax25_sock_timer_ack_sub() to subtract the value of
      a struct timeval from Timer T1
    * Implement patty_ax25_sock_timer_ack_expired() to indicate if the
      ack Timer T1 has expired
Other changes:
    * Rearrange patty_ax25_sock a bit
		
	
					 | 
			||
|---|---|---|
| .. | ||
| patty | ||