[FFmpeg-user] config log during ios for setup ijkmediaplay library

[Jim Shupert]

what would be the advantage to all the disabling ?

I suppose I am wondering -- why would one wish to 
--disable-protocol=concat ; to name 1.

and why state " --enable-protocol=async "  ,  is it not enabled by 
default -- if so then no explicit declare results in 
"--enable-protocol=async"