Requests with range headers seem to be failing when the webserver is running http/2.

Until we find the reason why they fail, we may disable range headers support if the webserver is running http/2.

See:

• https://support.joomlatools.com/tickets/topic/9989
• https://support.joomlatools.com/tickets/topic/9923
• https://support.joomlatools.com/tickets/topic/11436
• https://support.joomlatools.com/tickets/topic/11458-cannot-playback-mp3s-on-the-iphone
• https://support.joomlatools.com/tickets/topic/13701