all.equal.list() sometimes fails with unnamed and named components (PR#674)

I think that both the names and components should match exactly (the
components recursively).  Unfortunately the named-component extraction

is partial matching (at least, sometimes) so the ordering of the names
always matters.  (There's an S/R difference here I keep forgetting to 
write down. I think it is 

x <- list(aa=1, bb=2)
x["a"]

which gives in S
$aa:
[1] 1
and in R
$"NA"
NULL
so S always partial matches, but R does not always.)

More precisely, we have

R> x[["a"]]
[1] 1
R> x["a"] 
$"NA"
NULL

Does this make sense at all?  Comparing it to

R> x <- list(aa=1, bb=2, "NA"=3)
R> x["NA"]
$"NA"
[1] 3

I would think that the x["a"] incorrectly indicates that the list has a
named component "NA" with value NULL ...

What should we do about all.equal.list()?  Should we deal with the named
components first and strip them off, or always go the positional route?
Your comment that lists are generic vectors would indicate that the
second approach is more appropriate ...