when proxy enabled, update remote.is_private too (#1811)
when proxy enabled, update remote.is_private too (#1811)

reported by golden_receiver on #haraka
hatsebutz/Haraka,Synchro/Haraka,haraka/Haraka,msimerson/Haraka,hatsebutz/Haraka,Synchro/Haraka,msimerson/Haraka,hatsebutz/Haraka,bsmr-x-script/Haraka,smfreegard/Haraka,Synchro/Haraka,bsmr-x-script/Haraka,haraka/Haraka,smfreegard/Haraka,hatsebutz/Haraka,Synchro/Haraka,msimerson/Haraka,bsmr-x-script/Haraka,haraka/Haraka,bsmr-x-script/Haraka,smfreegard/Haraka,smfreegard/Haraka,msimerson/Haraka,haraka/Haraka