[tab:container.node.compat] is missing some compatibility cases LWG 3438

[joaquintides]

The aforementioned table lists which containers have compatible nodes. Seems like these three rows are missing:

multimap<K, T, C1, A>	multimap<K, T, C2, A>
multiset<K, C1, A>	multiset<K, C2, A>
unordered_­multimap<K, T, H1, E1, A>	unordered_­multimap<K, T, H2, E2, A>
unordered_­multiset<K, H1, E1, A>	unordered_­multiset<K, H2, E2, A>

[jensmaurer]

This seems non-editorial to me.
Forwarded to LWG reflector for feedback: http://lists.isocpp.org/lib/2020/04/16075.php

[Dani-Hub]

A corresponding Library issue exists now as LWG 3438