struct _parallelsConn: Mark @domains as immutable pointer
struct _parallelsConn: Mark @domains as immutable pointer

The pointer does not change throughout the while life of a
parallels connection. Mark it as such.

Signed-off-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>

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