
Environment variables used by libpsr:

PORTSLAVE_CONF - the location of the config file if it's not the compiled in
 default.

PORTSLAVELOGNAME - the name that is written to log files as the "login name"
 of the user.

PORTSLAVE_SESSION - the RADIUS protocol session code.

PORTSLAVE_START_TIME - the unix-format time that the session started.

CONNECT_INFO - connect data (carrier speed, V42, etc), whatever the modem
 returns between "CONNECT " and the end of the line.

PORTSLAVE_FILTER - the filter(s) to run on bringing up IP.

PORTSLAVE_FRAMED_ROUTE - the route(s) to add/remove when putting the link
 up/down.

PORTSLAVE_DO_ACCT - if set then do accounting.

PORTSLAVE_PORT - the port number for portslave.

PORTSLAVE_CLI_SRC - what CLI says is the customer's phone number.
PORTSLAVE_CLI_DST - what CLI says is the number the customer dialled.
