matching operator name case sensitive

[Peter Steadman]

Hi
I am totally new to freeradius and with the help of the excellent wiki (
https://wiki.freeradius.org/guide/eduroam) have a working test server with
only one apparent simple niggling issue, operator name matching is case
sensitive when using the expression below to match multiple domains. I
understand that cannot use "/i" in the this instance but am really
struggling to find another way making this case insensitive.
I should really appreciate it if someone could give me a hint, point me in
another direction or even better give an example.
many thanks
Pete

if (&Stripped-User-Domain != "${operator_name1}") && (&Stripped-User-Domain
!=  ${operator_name2}")&& (&Stripped-User-Domain != "${operator_name3}") &&
(&Stripped-User-Domain != "${operator_name4}")  {
update {
control:Load-Balance-Key := &Calling-Station-ID
control:Proxy-To-Realm := 'eduroam'
# Operator name (RFC 5580) identifies the network the
# request originated from. It's not absolutely necessary
# but it helps with debugging.
request:Operator-Name := "1${operator_name1}"
}
return
}

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