Unify links in 500 page with other error and landing pages
Unify links in 500 page with other error and landing pages

vivekanand1101/pontoon,jotes/pontoon,mozilla/pontoon,sudheesh001/pontoon,mastizada/pontoon,mathjazz/pontoon,vivekanand1101/pontoon,Osmose/pontoon,Jobava/mirror-pontoon,yfdyh000/pontoon,participedia/pontoon,m8ttyB/pontoon,Jobava/mirror-pontoon,mathjazz/pontoon,jotes/pontoon,Jobava/mirror-pontoon,sudheesh001/pontoon,vivekanand1101/pontoon,sudheesh001/pontoon,mozilla/pontoon,m8ttyB/pontoon,m8ttyB/pontoon,mastizada/pontoon,participedia/pontoon,yfdyh000/pontoon,vivekanand1101/pontoon,jotes/pontoon,mathjazz/pontoon,yfdyh000/pontoon,participedia/pontoon,mozilla/pontoon,jotes/pontoon,mathjazz/pontoon,participedia/pontoon,Jobava/mirror-pontoon,sudheesh001/pontoon,m8ttyB/pontoon,mastizada/pontoon,Osmose/pontoon,mathjazz/pontoon,Osmose/pontoon,mozilla/pontoon,mastizada/pontoon,yfdyh000/pontoon,Osmose/pontoon,mozilla/pontoon