Turn Sendfile to "off" for vagrant boxes

sendfile.sh

# A VirtualBox bug forces vagrant to serve
# corrupt files via Apache or nginx
# The solution to that would be to turn off
# the SendFile option in apache or nginx
#
# If you use apache as your main web server
# add this directive in your httpd.conf (or apache.conf)
# configuration file name may vary in various systems
#
EnableSendfile off

# If you use nginx as your main web server
# add this directive in your nginx.conf
sendfile off