The enrol/database plugin currently gets course startdate and enddate from the template only, but should allow setting these from the remote DB fields.

A complete fix for this would include:

• Add UI to specify the remote startdate and enddate field names
• Validate incoming startdate and enddate; validate startdate <= enddate
• If startdate is not set, default it to time()
• If enddate is not set or invalid, default enddate = 0
• If enddate is set and valid, default startdate=enddate
• If set and valid, set the course startdate and enddate on course creation
• For weekly course formats, set the course->numsections to the number of weeks in between startdate and enddate.
• Override the template values: startdate, enddate, numsections