starting haproxy 1.5-dev

[WARNING] 152/224012 (24314) : Warning: No such variable name 'Tr' in this log mode
[WARNING] 152/224012 (24314) : Warning: No such variable name 'st' in this log mode
[WARNING] 152/224012 (24314) : Warning: No such variable name 'cc' in this log mode
[WARNING] 152/224012 (24314) : Warning: No such variable name 'cs' in this log mode
[WARNING] 152/224012 (24314) : Warning: No such variable name 'hr' in this log mode
[WARNING] 152/224012 (24314) : Warning: No such variable name 'hs' in this log mode
[WARNING] 152/224012 (24314) : Warning: No such variable name 'r' in this log mode

solution:
(re)move "option httplog" from defaults to backend