[Exim] New AOL Mailer for forgery filter (for Exim 4.x)

For anyone that is using the previously-mentioned (on the list) ACL entry for
catching AOL forgeries, which was as follows:

   deny    sender_domains = aol.com
           message        = X-Forgery: NOT AOL MAILER
           condition      = ${if match {$h_X-Mailer:} {.*[Aa][Oo][Ll].*} {no}{yes}}

AOL now has (apparently) a Webmail solution, using the Atlas Mailer 2.0. Because
of this, the ACL entry needs to be changed to:

   deny    sender_domains = aol.com
           message        = X-Forgery: NOT AOL MAILER
           condition      = ${if or {{match {$h_X-Mailer:} {.*[Aa][Oo][Ll].*}
{no}{yes}} {match {$h_X-Mailer:} {.*[Aa][Tt][Ll][Aa][Ss].*} {no}{yes}}}}

As always, watch the line-wrapping (the condition line should be a single line
in the configuration file).