jsoninfo: rename the two MTU data points for clarity
jsoninfo: rename the two MTU data points for clarity

nolith/olsrd,nolith/olsrd,diogomg/olsrd-binary-heap,diogomg/olsrd,duydb2/olsr,cholin/olsrd,ninuxorg/olsrd,sebkur/olsrd,diogomg/olsrd-binary-heap,duydb2/olsr,zioproto/olsrd,duydb2/olsr,zioproto/olsrd,acinonyx/olsrd,servalproject/olsr,diogomg/olsrd-binary-heap,acinonyx/olsrd,ninuxorg/olsrd,zioproto/olsrd,duydb2/olsr,tdz/olsrd,acinonyx/olsrd,sebkur/olsrd,duydb2/olsr,ninuxorg/olsrd,servalproject/olsr,diogomg/olsrd,diogomg/olsrd,sebkur/olsrd,cholin/olsrd,servalproject/olsr,zioproto/olsrd,servalproject/olsr,duydb2/olsr,nolith/olsrd,diogomg/olsrd-binary-heap,tdz/olsrd,sebkur/olsrd,nolith/olsrd,acinonyx/olsrd,sebkur/olsrd,diogomg/olsrd,ninuxorg/olsrd,tdz/olsrd,cholin/olsrd,duydb2/olsr,acinonyx/olsrd,servalproject/olsr,diogomg/olsrd,nolith/olsrd,sebkur/olsrd,zioproto/olsrd,duydb2/olsr,servalproject/olsr,diogomg/olsrd-binary-heap,tdz/olsrd,ninuxorg/olsrd,tdz/olsrd,cholin/olsrd,cholin/olsrd,diogomg/olsrd-binary-heap,diogomg/olsrd-binary-heap,diogomg/olsrd,diogomg/olsrd