postData.sh: fix DAYTIME_CAPTURE bug
postData.sh: fix DAYTIME_CAPTURE bug

DAYTIME is old name, DAYTIME_CAPTURE is new name (and it uses true/false instead of 0/1).
Until the new config.sh is fully deployed, check for both variables.
thomasjacquin/allsky,thomasjacquin/allsky,thomasjacquin/allsky