Key words of MAP should be normalized to SET-WORDS

[Oldes]

The map! can now have keys of any word! type:

>> words-of probe make map! [a 1 b: 2 :c 3 'd 4]
make map! [
    a 1
    b: 2
    :c 3
    'd 4
]
== [a b: :c 'd]

It should be normalized lie in Red:

>> words-of probe make map! [a 1 b: 2 :c 3 'd 4]
#(
    a: 1
    b: 2
    c: 3
    d: 4
)
== [a b c d]

Related issue: #2353

[hostilefork]

I don't see that it makes sense to ask a MAP for its "words"--when the keys can be anything (in Ren-C literally anything). It should be keys of, and if one wants filtering of that because you know your map is just word keys it should be in userspace. (Note: functions have parameters of in Ren-C, there is no "words of" there either.)