Improvement
- [ECFLOW-1558] - server: server can not write to the log file
- [ECFLOW-1563] - ecflow_start.sh to start a halted server with -H option
- [ECFLOW-1585] - Support building eFlow4 with Boost 1.71
- [ECFLOW-1586] - installation: Avoid dependency on boost debug libraries
- [ECFLOW-1589] - server: when ECF_JOB_CMD fails , but task is completed or active, avoid abort