Use isxdigit(3) instead of ishexnumber(3). The former belongs to C90 standard, while the latter does not.
Use isxdigit(3) instead of ishexnumber(3). The former belongs to C90
standard, while the latter does not.

Submitted by:	Greger Viken Teigre

mab-netdev/rtpproxy,mab-netdev/rtpproxy,Vocalocity/rtpproxy-pre,hongbinz/rtpproxy,sippy/rtpproxy,DrumTechnologiesLtd/rtpproxy,gtkiller/rtpproxyd,kiryu/rtpproxy,hongbinz/rtpproxy,Vocalocity/rtpproxy-pre,miconda/rtpproxy,dsanders11/rtpproxy,Vocalocity/rtpproxy-pre,jevonearth/rtpproxy,viraptor/RTPproxy,sippy/rtpproxy,jevonearth/rtpproxy,miconda/rtpproxy,kiryu/rtpproxy,Vocalocity/rtpproxy-pre,viraptor/RTPproxy,hongbinz/rtpproxy,sippy/rtpproxy,jevonearth/rtpproxy,miconda/rtpproxy,hongbinz/rtpproxy,synety-jdebp/rtpproxy,synety-jdebp/rtpproxy,synety-jdebp/rtpproxy,mab-netdev/rtpproxy,DrumTechnologiesLtd/rtpproxy,synety-jdebp/rtpproxy,jevonearth/rtpproxy,gtkiller/rtpproxyd,kiryu/rtpproxy,dsanders11/rtpproxy,DrumTechnologiesLtd/rtpproxy,dsanders11/rtpproxy