Revert "xbmc: init takes care of reboot and shutdown"

This reverts commit 71f3f63a97dda6e6297bfad058741506ec2029a6.
Revert "libass: add some notes for newer releases"

This reverts commit 960b3b57e2238157f4f60897b691ab145326755d.
libass: update to libass-0.11.1

Signed-off-by: Stephan Raue <stephan@openelec.tv>
gmp: update to gmp-6.0.0a

Signed-off-by: Stephan Raue <stephan@openelec.tv>
curl: downgrade to curl-7.34.0, add notes about recent releases

Signed-off-by: Stephan Raue <stephan@openelec.tv>
curl: update to curl-7.36.0

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Linux (Radeon): Take care that post and ref divider don't grow too large