deinitialize SMB before suspend
deinitialize NFS,AFP and SFTP before suspend
dvdplayer: move CanSeek/CanPause to seekable interface
dvdplayer: disable seeking and pause for udp/rtp and seek for tcp
dvdplayer: move navigator state into IMenus
backport some constructor initializations from 92e8bc4a4361d730abac9ad3080cd6923e9d551a
Fixed: do not send Range request header when encounter error.
AE: Workaround (ugly) non existing channel maps in old ffmpeg (workarounds: #14407)
[TLBB] Remove option to powerdown (for now)