bug#40582: Valid URIs are rejected

Hi,

Julien Lepiller <[email protected]> skribis:

> Le 17 juin 2020 17:57:33 GMT-04:00, "Ludovic Courtès" <[email protected]> a écrit :

[...]

>>The regexp below is still an approximation, but I think a better one.
>>Can you confirm?
>>
>>Thanks,
>>Ludo’.
>
> Looks slightly better, thanks.
>
> That's still incorrect, as it will match things that are not ipv6 addresses. Does it have to be a regexp though? Why not simply check (false-if-exception (inet-pton AF_INET6 host)), as in the return value of valid-host?

Using a regexp makes the code closer to the RFC since the RFC explicitly
describes the grammar.  It’s also the simple choice here.

> There's also a ipv6-host-pat that has an incorrect regexp, but I'm not sure what it is used for.

It’s use for ‘authority-regexp’, but that one is fine: it requires
square brackets around IPv6 addresses.

Pushed as 1ab2105339f60dba20c8c9680e49110501f3a6a0.

Thanks,
Ludo’.