Merge pull request #29163 from totten/master-fm-autosvc

ext/flexmailer/flexmailer.php

ext/flexmailer/src/ClickTracker/HtmlClickTracker.php

ext/flexmailer/src/ClickTracker/TextClickTracker.php

ext/flexmailer/src/Listener/Abdicator.php

ext/flexmailer/src/Listener/Attachments.php

ext/flexmailer/src/Listener/BaseListener.php

ext/flexmailer/src/Listener/BasicHeaders.php

ext/flexmailer/src/Listener/BounceTracker.php

ext/flexmailer/src/Listener/DefaultBatcher.php

ext/flexmailer/src/Listener/DefaultComposer.php

ext/flexmailer/src/Listener/DefaultSender.php

ext/flexmailer/src/Listener/HookAdapter.php

ext/flexmailer/src/Listener/IsActiveTrait.php

ext/flexmailer/src/Listener/OpenTracker.php

ext/flexmailer/src/Listener/RequiredFields.php

ext/flexmailer/src/Listener/RequiredTokens.php

ext/flexmailer/src/Listener/TestPrefix.php

ext/flexmailer/src/Listener/ToHeader.php

ext/flexmailer/src/Services.php