[Exim] -bS uses smtp_receive_timeout

Hi folks,

It seems like -bS / -bs use the value of smtp_receive_timeout instead of
accept_timeout, because they can't be prevented from timing out without
adjusting smtp_receive_timeout.

Wouldn't it make more sense for them to use accept_timeout, which can at
least be overridden with the -or command-line option?

Ciao,
Sheldon.