Those who disagree, or know that they are talking to mail servers that,
even today, are not 8-bit clean, need to turn off this option.
+ 9. Exim can now be started with -bw (with an optional timeout, given as
+ -bw<timespec>). With this, stdin at startup is a socket that is
+ already listening for connections. This has a more modern name of
+ "socket activation", but forcing the activated socket to fd 0. We're
+ interested in adding more support for modern variants.
+
Version 4.77
------------