debian: s/UNRELEASED/unstable/ due to updated packages being built
fix viewmtn url


(*sigh*)
html validation fixes


xmllint didn't find these problems (but tidy did).
 * IRC Server tunnel: Reject bad protocols immediately
HTML fixes in readme_ar.html
merge of '00acf6715c7e3d5519672b335bb833f2f88f5ca1'
     and '4790dff566ce61cb8a5bfefa0c423df44a784fa5'