Update Sodium Compat to 1.17.0 (PHP 8.1 compatibility)

[jrf]

Sodium_Compat 1.17.0 has just been released and includes fixes for PHP 8.1 compatibility as well as a fix for PHP 5.6 compatibility.

The version included with WP should be updated.

Full details:

• ​https://github.com/paragonie/sodium_compat/releases/tag/v1.17.0
• ​https://github.com/paragonie/sodium_compat/compare/v1.16.1...v1.17.0

I've reviewed the diff and would strongly recommend an update at the earliest convenience.

Previously: #48371, #51399, #51925, #53274
Related: #53635

[SergeyBiryukov]

In 51591:

Upgrade/Install: Update sodium_compat to v1.17.0.

The latest version of sodium_compat includes fixes for PHP 8.1 compatibility and a fix for PHP 5.6 compatibility.

A full list of changes in this update can be found on GitHub:
​https://github.com/paragonie/sodium_compat/compare/v1.16.1...v1.17.0

Follow-up to [49741], [51002].

Props jrf.
Fixes #53907.

[paragoninitiativeenterprises]

We came here to let you know about this release in case the MB_OVERLOAD_STRING change affected WP installs, but we're pleased to see you're already aware of it and applied the update.

Great job, WordPress team. You've completely exceeded our expectations.

[jrf]

@paragoninitiativeenterprises Thank you! Those are the kind of words we like to hear and thank you for all your work on Sodium Compat!