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URL-SYNTAX.md: document the new 'localhost' treatment

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Daniel Stenberg 2021-05-31 08:33:44 +02:00
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@ -168,6 +168,15 @@ brackets). For example:
http://[2001:1890:1112:1::20]/
### "localhost"
Starting in curl 7.77.0, curl will use loopback IP addresses for the name
`localhost`: `127.0.0.1` and `::1`. It will not try to resolve the name using
the resolver functions.
This is done to make sure the host accessed is truly the localhost - the local
machine.
### IDNA
If curl was built with International Domain Name (IDN) support, it can also