Use CB_MORE and simplify update_derived() function.
Use CB_MORE and simplify update_derived() function.

dsanders11/rtpproxy,dsanders11/rtpproxy,synety-jdebp/rtpproxy,synety-jdebp/rtpproxy,jevonearth/rtpproxy,synety-jdebp/rtpproxy,jevonearth/rtpproxy,synety-jdebp/rtpproxy,jevonearth/rtpproxy,sippy/rtpproxy,sippy/rtpproxy,jevonearth/rtpproxy,dsanders11/rtpproxy,sippy/rtpproxy