*** Notes for version 4.0

Initial implementation of "plug and play" in SNOS.

Remove any reference to serscan from AUTOEXEC.BAT.

SNOS will now determine what ports (serial and ethernet)
are available and set them up automatically.

The command "include /nos/sys/devices.txt" must be in your
startup.txt file, after the initial system name etc. declarations.
Remove all commands "attach com" and "attach ether" from startup.txt.
SNOS will create those interfaces automatically as:
For serial ports, the names are s1, s2, s3, s4 etc.
For the ethernet port the names are et1 and et2.

See the startup.txt for DMASCS for an example.

Addition of two required files in sys:
devices.txt is created by SNOS at startup via serscan.
serdef.txt  is placed in sys at install.

serdef is used by serscan to determine the UART types.
devices is created by serscan and read by SNOS.

*** Notes for version 3.14b

Working with BPQ using B2F forwarding protocol.

*** Notes for version 3.11

Added command com watchdog portname.
Emits a 1/2 Hz squarewave on the DTR pin of the given serial port.

*** Notes for version 3.10

Default is to NOT pick up users Winlink traffic from CMS.
Command added to toggle the above per user.

*** Notes for version 3.9

The User: command in forward.txt is no longer used.

*** Notes for version 3.6h

For the case of a single ping, SNOS will now respond
with "Trying aaa.bbb.ccc.ddd" so you know which IP
address is actually being tested. Also added a ping
timeout response for the case where a response is
not seen.

Dot commands now work from the node, but only for sysops.

*** Notes for version 3.6f

An important addition to the netrom code.
If an intermediate node in the path to the target node
no longer has a route to the target node, SNOS will now
return a "not acknowledge" to the source node. This will
cause the source node to report a connect failure, and
will not continue to attempt the connect. This can remove
quite a bit of network traffic when nodes come and go,
and will also speed up forwarding significantly when a
node "goes away".

*** Notes for version 3.6c

Auto-update via internet now uses port 8088.

*** Notes for version 3.6a

NET/ROM split horizon.
Command added: netrom split on/off
Default is on.