Support adaptive_sync

[madic-creates]

At the moment adaptive_sync is not supported:

unknown directive 'adaptive_sync' in profile output

Example Config:

profile NG_HOME2 {
  output "Chimei Innolux Corporation 0x15D3 0x00000000" disable
  output "Acer Technologies Acer XB241H T5VEE0024200" mode 1920x1080 position 0,0 adaptive_sync on
  output "Samsung Electric Company SyncMaster H9XQB06704" mode 1920x1200@59.950001Hz position 1920,0
}

[emersion]

Needs a protocol addition.