[perl #123062] & proto: only sub{} and \&sub

It was allowing \@array, \%hash, \($list, %of, @refs), undef, and
recently also \$scalar.  It should only allow sub{} and \&sub.
Update Test-Simple to Alpha 078
Add 2 more problematic mods to perl5220delta
known_pod_issues.dat: 2 more known mods
perl5220delta: Hook::LexWrap is fixed