Proto: change (from/until)_datetime to optional
Proto: change (from/until)_datetime to optional

thiphariel/navitia,kadhikari/navitia,CanalTP/navitia,xlqian/navitia,Tisseo/navitia,patochectp/navitia,djludo/navitia,ballouche/navitia,is06/navitia,antoine-de/navitia,TeXitoi/navitia,is06/navitia,djludo/navitia,is06/navitia,kadhikari/navitia,CanalTP/navitia,xlqian/navitia,TeXitoi/navitia,VincentCATILLON/navitia,ballouche/navitia,pbougue/navitia,kinnou02/navitia,frodrigo/navitia,kinnou02/navitia,francois-vincent/navitia,Tisseo/navitia,xlqian/navitia,antoine-de/navitia,patochectp/navitia,Tisseo/navitia,prhod/navitia,VincentCATILLON/navitia,frodrigo/navitia,is06/navitia,lrocheWB/navitia,francois-vincent/navitia,djludo/navitia,CanalTP/navitia,frodrigo/navitia,francois-vincent/navitia,djludo/navitia,kinnou02/navitia,Tisseo/navitia,pbougue/navitia,ballouche/navitia,fueghan/navitia,prhod/navitia,patochectp/navitia,ballouche/navitia,CanalTP/navitia,antoine-de/navitia,fueghan/navitia,TeXitoi/navitia,datanel/navitia,xlqian/navitia,Tisseo/navitia,antoine-de/navitia,CanalTP/navitia,frodrigo/navitia,thiphariel/navitia,datanel/navitia,thiphariel/navitia,pbougue/navitia,xlqian/navitia,prhod/navitia,prhod/navitia,kinnou02/navitia,fueghan/navitia,datanel/navitia,fueghan/navitia,pbougue/navitia,datanel/navitia,VincentCATILLON/navitia,lrocheWB/navitia,lrocheWB/navitia,patochectp/navitia,VincentCATILLON/navitia,francois-vincent/navitia,TeXitoi/navitia,lrocheWB/navitia,thiphariel/navitia,kadhikari/navitia,kadhikari/navitia