rpc: Fix reference counting around virNetSocketAddIOCallback
rpc: Fix reference counting around virNetSocketAddIOCallback

Ref service passed as a parameter to the callback.  And don't unref the
socket that is part of the service being passed at another point in code.

Signed-off-by: Martin Kletzander <e82f23e74d43760279ebcc505dac4ae70d5627d0@redhat.com>

rlaager/libvirt,fabianfreyer/libvirt,agx/libvirt,olafhering/libvirt,VenkatDatta/libvirt,olafhering/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,andreabolognani/libvirt,taget/libvirt,jfehlig/libvirt,jfehlig/libvirt,rlaager/libvirt,olafhering/libvirt,datto/libvirt,agx/libvirt,jfehlig/libvirt,taget/libvirt,VenkatDatta/libvirt,crobinso/libvirt,rlaager/libvirt,fabianfreyer/libvirt,agx/libvirt,jardasgit/libvirt,rlaager/libvirt,jardasgit/libvirt,nertpinx/libvirt,nertpinx/libvirt,libvirt/libvirt,eskultety/libvirt,VenkatDatta/libvirt,jardasgit/libvirt,rlaager/libvirt,zippy2/libvirt,libvirt/libvirt,crobinso/libvirt,crobinso/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,taget/libvirt,olafhering/libvirt,libvirt/libvirt,datto/libvirt,zippy2/libvirt,zippy2/libvirt,nertpinx/libvirt,agx/libvirt,VenkatDatta/libvirt,eskultety/libvirt,zippy2/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,eskultety/libvirt,andreabolognani/libvirt,libvirt/libvirt,datto/libvirt,taget/libvirt,nertpinx/libvirt,andreabolognani/libvirt,eskultety/libvirt,crobinso/libvirt,andreabolognani/libvirt,datto/libvirt,datto/libvirt,jfehlig/libvirt,agx/libvirt,eskultety/libvirt,VenkatDatta/libvirt,taget/libvirt