Fixed #3878 and #3901: function filter_var missing

Till Brehm

2016-05-26 30aae443d7732380a9f0c243d88015132a9a2875

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[Definition]
failregex = (?: pop3-login|imap-login): .*(?:Authentication failure|Aborted login \(auth failed|Aborted login \(tried to use disabled|Disconnected \(auth failed).*rip=(?P<host>\S*),.*
ignoreregex =