Changes made to support modem on the Async port.

/* 19/12/95 Sowmya */
Changes made for Dial-On-Demand
1. defs.h	: __DOD__
2. waninit.c	: In initialize_wan, we just register with the HLDD.
		  Actual initialization of the port is initiated by the
		  HLDD by calling wan_control with INIT_SERIAL_PORT command &
		  OPEN_SERIAL_PORT commands. When OPEN_SERIAL_PORT is called
		  enable_tx_rx is called to actually enable the WAN port.
3. lslproto.h	: Added INIT_SERIAL_PORT in SERIAL_DRIVER_CONTROL

20/1/96
-------
4. waninit.c	: Reduced the number of RX_BUFFERS to 128 and changed the
   kwan.h	  scheme for allocating buffers for the rx_descriptors
		  in initialize_rx_descriptors


24/1/96
-------
waninit.c	: The 'state' field in WAN_PORT_CLASS is used as a flag
		  to avoid re-entrancy when CLOSE_SERIAL_PORT is called
		  for async-direct_connect or sync. The first time, 
		  LOWER_DEVICE_DRIVER_DOWN is called and the next time
		  LOWER_DEVICE_DRIVER_UP & OPEN calls are made.
		  For direct_connect and sync, the state is set to
		  CONNECTED in InitSCC.

5, February, 1996
-----------------
1. wantx.c, send_wan_packet() - added foll. code to keep statistic
++((DEVICE_DRIVER_REGISTRATION_ENTRY *)(sptr_wan_port_class->device_driver_id)->rfc1213_ifEntry.ifOutQLen);
   This is just after the code incrementing number_of_packets_to_tx field.
2. wantx.c, wan_tx_isr_complete() - added foll. code to keep statistic
--((DEVICE_DRIVER_REGISTRATION_ENTRY *)(sptr_wan_port_class->device_driver_id)->rfc1213_ifEntry.ifOutQLen);
   This is just after the code decrementing number_of_packets_to_tx_field.

NOTE: Above change required access to some LSL structures. So these structs
were moved out of VLSLSTR.H in LSL directory and into the include directory 
to LSLPROTO.H.

3. wanrx.c, wan_rx_error_adjust_scheduled_rx_list() - modified to accept
   one more parameter indicating if the function was called due to a buffer
   overflow error or any other kind of error. Introduced code that uses thi

31/10/97 Vidy
vwanstr.h
introduced 2 more variables to keep track of the number of packets xmited
and received during a connection. (for sake of Proxy server statistics)
These variables are reset and updated in many files 

04/11/1997
----------
        Added code to record the connect message.

02/01/1998
----------
Naveen changed NUMBER_OF_RX_BUFFERS to 64 from 128 in kwan.h
