This cleanup is necessary in order to allow a smooth transition to
LISTSERV-TCP/IP. When a BITNET user writes to a LISTSERV-TCP/IP site, his
address will be userid%nodeid.BITNET@gateway, where the gateway will vary
randomly depending on how the message got routed that particular day.
That makes it next to impossible for the users to manage their
subscriptions. The list owner has to be involved every time. To solve
this problem, LISTSERV trashes the gateway part when it recognizes a
BITNET address.
Eric