remove deprecated functions calls of QXmppConfiguration
remove deprecated functions calls of QXmppConfiguration

Kaffeine/qxmpp,LightZam/qxmpp,ycsoft/qxmpp,pol51/QXMPP-CMake,projedi/qxmpp-ffmpeg,LightZam/qxmpp,pol51/QXMPP-CMake,unisontech/qxmpp,olesalscheider/qxmpp,kollix/qxmpp,gamenet/qxmpp_old,gamenet/qxmpp_old,trulabs/qxmpp-old,projedi/qxmpp-ffmpeg,olesalscheider/qxmpp,trulabs/qxmpp-old,gamenet/qxmpp,unisontech/qxmpp,LightZam/qxmpp,kollix/qxmpp,Kaffeine/qxmpp,Kaffeine/qxmpp,deepak899/qxmpp,kollix/qxmpp,trulabs/qxmpp-old,cccco/qxmpp,deepak899/qxmpp,olesalscheider/qxmpp,gamenet/qxmpp,Ilyatk/qxmpp,gotomypc/qxmpp,Ilyatk/qxmpp,deepak899/qxmpp,cccco/qxmpp,pol51/QXMPP-CMake,gotomypc/qxmpp,Ilyatk/qxmpp,gotomypc/qxmpp,KangLin/qxmpp,ycsoft/qxmpp,ycsoft/qxmpp,cccco/qxmpp,gamenet/qxmpp_old,KangLin/qxmpp,gamenet/qxmpp,unisontech/qxmpp,KangLin/qxmpp