**BUG**
Concise problem statement: A previously working export/import workflow to OSHPark PCB fab is no longer working.
Steps to reproduce bug:
1. Generate PCB on easyeda.com and export as ZIP
2. Extract ZIP, rename files from EXT to boardname.EXT.
2a. For example GBL file becomes board.GBL
3. Re-compress the ZIP, upload it to OSHPark.com to be fabbed
Results: OSHPark can't read the file due to an unknown error. I have opened support ticket 16738 with them about this.
Expected results: This workflow used to work, for example see https://oshpark.com/shared_projects/fhiGl3oz which I made on easyeda and oshpark fabbed.
Browser: Chrome on Mac