This is a maintenance release with a new feature: DSN URL parsing, which allows you to create a PHPMailer instance with most important settings by passing in a single URL, ideal for configuring PHPMailer from an environment variable.
Note: This commit does not include new DSN class, as it is not particularly relevant for WordPress core at this time.
References:
* [https://github.com/PHPMailer/PHPMailer/releases/tag/v6.8.0 PHPMailer 6.8.0 release notes]
* [https://github.com/PHPMailer/PHPMailer/compare/v6.7...v6.8.0 Full list of changes in PHPMailer 6.8.0]
Follow-up to [50628], [50799], [51169], [51634], [51635], [52252], [52749], [52811], [53500], [53535], [53917], [54427], [54937].
Props ayeshrajans, jrf, Synchro.
Fixes#57873.
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git-svn-id: http://core.svn.wordpress.org/trunk@55069 1a063a9b-81f0-0310-95a4-ce76da25c4cd