2.7.0: bypass clamd scanning when daemon did not respond

[david touzeau]

sometimes the clamd daemon is overloaded and did not respond.
In this case, amavisd did not want to handle mails and return error to
postfix.

Is there any option to force amavis skipping antivirus processing when
the antivirus engine is down or did not respond in time ?

I have set ['always-clean', sub {0}], in @av_scanners_backup but
messages are always rejected when clamd socket is not available: 

Oct 11 20:03:07 ns1 l/sbin/amavisd (ch2-11525-02)[11525]: (11525-02)
(!)connect to /var/run/clamav/clamav.sock failed, attempt #1: Can't
connect to UNIX socket /var/run/clamav/clamav.sock: No such file or
directory


Best regards


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