news: Introduce rules for the schema file and fix offending lines
news: Introduce rules for the schema file and fix offending lines

Add stricter rules for the news file and fix offending entries.

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