Add support for Microsoft POP3 XOAUTH2

[griesi007]

Signed-off-by: griesi007 noreply@12live.de

Add support for Microsoft POP3 via modern authentication in addition to rejected pull request #199 with required integration tests

$storage = new \Laminas\Mail\Storage\Pop3(
	Laminas\Mail\Protocol\Pop3\Xoauth2\MicrosoftFactory::getInstance(
		'Outlook.office365.com',
		'mail@example.com',
		'accessToken'
	)
);

[Slamdunk]

Thank you @griesi007 for the improvements over the first PR.
Check the few changes I pinpointed and let's see how the shape looks.
Please rebase the PR as the first step.

[griesi007]

@Slamdunk : what´s the current status on this pull request? All requested changes habe been applied some time ago. Is it still considered to be accepted and merged?

[Slamdunk]

I'm sorry for the late reply, indeed I forgot this.

I don't know how to handle this properly though: I am not able to check that this PR works, I don't have an Office365 account.

@Ocramius @weierophinney beside the formal correctness of the code and adherence to laminas standards, is trusting the contributor enough to merge a PR with a new feature, when I cannot test it and its test cannot be automated?

[Ocramius]

@Slamdunk if you are happy with just the unit test, then let's move it forward.