input-selector: default to sync-streams=true
input-selector: default to sync-streams=true

I think this is the expected behaviour, and we couldn't do this
in 0.10 for backwards-compatibility reasons, so change it now.

ensonic/gstreamer,justinjoy/gstreamer,centricular/gstreamer,lovebug356/gstreamer,jpxiong/gstreamer,collects/gstreamer,collects/gstreamer,cablelabs/gstreamer,cfoch/gstreamer,krichter722/gstreamer,shelsonjava/gstreamer,cablelabs/gstreamer,krieger-od/gstreamer,justinjoy/gstreamer,Lachann/gstreamer,cfoch/gstreamer,krichter722/gstreamer,lovebug356/gstreamer,surround-io/gstreamer,shelsonjava/gstreamer,lubosz/gstreamer,surround-io/gstreamer,ensonic/gstreamer,lovebug356/gstreamer,surround-io/gstreamer,collects/gstreamer,mparis/gstreamer,StreamUtils/gstreamer,surround-io/gstreamer,surround-io/gstreamer,Lachann/gstreamer,collects/gstreamer,shelsonjava/gstreamer,cfoch/gstreamer,centricular/gstreamer,krichter722/gstreamer,mparis/gstreamer,StreamUtils/gstreamer,krieger-od/gstreamer,centricular/gstreamer,collects/gstreamer,cfoch/gstreamer,cablelabs/gstreamer,lubosz/gstreamer,justinjoy/gstreamer,jpakkane/gstreamer,shelsonjava/gstreamer,lovebug356/gstreamer,Lachann/gstreamer,cfoch/gstreamer,Lachann/gstreamer,krichter722/gstreamer,StreamUtils/gstreamer,justinjoy/gstreamer,centricular/gstreamer,krichter722/gstreamer,justinjoy/gstreamer,jpxiong/gstreamer,krieger-od/gstreamer,krieger-od/gstreamer,jpxiong/gstreamer,mparis/gstreamer,cablelabs/gstreamer,jpakkane/gstreamer,ensonic/gstreamer,jpxiong/gstreamer,lubosz/gstreamer,jpakkane/gstreamer,lubosz/gstreamer,krieger-od/gstreamer,mparis/gstreamer,ensonic/gstreamer,StreamUtils/gstreamer,lubosz/gstreamer,lovebug356/gstreamer,mparis/gstreamer,centricular/gstreamer,cablelabs/gstreamer,jpakkane/gstreamer,StreamUtils/gstreamer,Lachann/gstreamer,ensonic/gstreamer,jpxiong/gstreamer,shelsonjava/gstreamer,jpakkane/gstreamer