Bug#1040870: Document how to use IGNORE_SMTP_LINE_LENGTH_LIMIT

[Dan Jacobson]

Package: exim4-config
Version: 4.96-16

Users need to set
IGNORE_SMTP_LINE_LENGTH_LIMIT=true
else they cannot forward messages except ones with short lines.

Alas,

# update-exim4.conf --verbose
using non-split configuration scheme from /etc/exim4/exim4.conf.template
undocumented line IGNORE_SMTP_LINE_LENGTH_LIMIT=true found in
/etc/exim4/update-exim4.conf.conf, generating exim macro