server/red_worker: split display_channel_send_item
server/red_worker: split display_channel_send_item

Split it out of display_channel_push.

mathslinux/spice,freedesktop-unofficial-mirror/spice__spice,dezelin/spice,fgouget/spice,freedesktop-unofficial-mirror/spice__spice,alon/spice-server,Fantu/spice,fgouget/spice,elmarco/spice,dezelin/spice,alon/spice-server,alon/spice-server,elmarco/spice,dezelin/spice,alon/spice-server,elmarco/spice,ya-mouse/spice,ya-mouse/spice,SPICE/spice,mathslinux/spice,Fantu/spice,dezelin/spice,fgouget/spice,mathslinux/spice,elmarco/spice,dezelin/spice,ya-mouse/spice,SPICE/spice,mathslinux/spice,freedesktop-unofficial-mirror/spice__spice,Fantu/spice,freedesktop-unofficial-mirror/spice__spice,elmarco/spice,alon/spice-server,freedesktop-unofficial-mirror/spice__spice,mathslinux/spice,fgouget/spice,SPICE/spice,Fantu/spice