Replace fopen by mg_fopen
Replace fopen by mg_fopen

mg_fopen uses unicode (UTF-8) file names in windows, while fopen uses code page depending string encoding

GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver,GerHobbelt/civet-webserver