conf: Export virStorageVolType enum helper functions
conf: Export virStorageVolType enum helper functions

Export string conversion from and to the virStorageVolType enum.

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