The code has been using terms that were found exclusive and potentially
derogatory. Fixing the terms and making the variables and methods
consistent with the related admin settings.
Previously we appended a dot at the end of IP addresses and domain names in the
cURL security helper, but it causes issues with Google OAuth so this patch removes it.
Freaky deaky Unicode/octal/hex domains can be resolved by cURL but are technically not valid.
This patch causes anything that Moodle does not consider to be a valid domain or IP to be blocked
by the cURL security helper.