Created attachment 3825 [details] [review]
As far as I can see this syspref is written as ILS-DI:AuthorizedIPs in all of these places:
* opac/ilsdi.pl (line 155: my @AuthorizedIPs = split(/,/, C4::Context->preference('ILS-DI:AuthorizedIPs'));)
In fact, the only place I can find it referred to as ILS-DI:Authorized_IPs is in the manual: http://koha-community.org/documentation/3-4-manual-en/?ch=c18#webserviceprefs
So perhaps it's easier to just change the manual?
I agree, changing the manual looks like the win here