I could've sworn we were already doing this, but apparently not? Anyway,
ROID suffixes have a number of requirements on them that weren't being
enforced, so this enforces them. All existing production data is compliant
with these requirements; the only existing bad data we have is in alpha and
sandbox.
ROID suffixes are now required to match the regex ^[A-Z0-9_]{1,8}$
See also https://tools.ietf.org/html/rfc5730
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