delete log entries older than one week
delete log entries older than one week

njam/CM,tomaszdurka/CM,vogdb/cm,mariansollmann/CM,njam/CM,zazabe/cm,vogdb/cm,fauvel/CM,alexispeter/CM,alexispeter/CM,tomaszdurka/CM,fvovan/CM,vogdb/cm,cargomedia/CM,zazabe/cm,vogdb/cm,mariansollmann/CM,fvovan/CM,vogdb/cm,njam/CM,fauvel/CM,alexispeter/CM,christopheschwyzer/CM,cargomedia/CM,fvovan/CM,fauvel/CM,tomaszdurka/CM,christopheschwyzer/CM,cargomedia/CM,njam/CM,mariansollmann/CM,zazabe/cm,tomaszdurka/CM,fauvel/CM,mariansollmann/CM,cargomedia/CM,alexispeter/CM,fauvel/CM,christopheschwyzer/CM,njam/CM,christopheschwyzer/CM,zazabe/cm,fvovan/CM,tomaszdurka/CM