the hack at the following link appears to work, small code addition.
An array of acceptable filetypes is provided and a nice pop up warning occurs if you try to upload something not in the list
https://moodle.org/mod/forum/discuss.php?d=278392
An array of acceptable filetypes is provided and a nice pop up warning occurs if you try to upload something not in the list
https://moodle.org/mod/forum/discuss.php?d=278392