Bug#399930: logrotation race condition with exim writing to logs

[CaT]

Actually, the permissions on the exim created logfile will be correct
seeing as

#------------------------------------------------------------------------------
# The log files themselves are created as required, with a mode that
# defaults
# to 0640, but which can be changed here.

# LOG_MODE=0640

So there is absolutely no need for the create option in logrotate (but
seeing as 'create' is set by default it should be replaced with
nocreate).

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    greatest tribute."
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