deparse-skips.txt: More passing tests
deparse-skips.txt: Note a couple skip reasons
Some lexical sub deparsing fixes

Prototypes were being ignored.

$ ./perl -Ilib -mO=Deparse -XMfeature=lexical_subs -e 'my sub f(\$); f($f)'
use feature 'lexical_subs';
no warnings;
my sub f (\$);
f(\$f);          # <---- wrong; this is a compilation error
-e syntax OK

Self-referential subs (state sub b; state sub b { b }) were causing
infinite recursion.