Allow for mixed case variant aliases

[acoffman]

As part of this (names and aliases both):

• [ ] go back and downcase the "rs" in all rsIDs
• [ ] "del" should be downcased in names and aliases (match specifically del only, not "deletion" etc)
• [ ] "ins"
• [ ] "fs"
• [ ] "c." or "p."
• [ ] "dup"

[kkrysiak]

I believe this is done.

[acoffman]

@kkrysiak support for it exists, but the backfill of existing aliases isn't complete. Should be pretty straightforward