Fix AddressList toString method to quote semicolon

[glensc]

Certain input of AddressList headers, cannot be converted to string and back to header object because of incorrect quoting:

From: "Foo;" <root@example.com>

gets incorrectly converted as

From: Foo; <root@example.com>

but ; is address separator, so it needs to be quoted:

From: "Foo;" <root@example.com>

The problem I discovered internally when using Storage\Message with Headers input, therefore testing that method is included in the unit test:

$message = new Message(['headers' => new Headers(), 'content' => (string)$body]);

// Mime\Decode::splitMessage calls toString on headers object which creates invalid result:
if ($message instanceof Headers) {
    $message = $message->toString();
}

[glensc]

@weierophinney, @Xerkus can you take care of this?

[glensc]

this is a regression from #147 as it added ; separator support that's why (i believe) this exception is caught.

however, there should not be an assumption that only zend-mail is used for reading writing mail messages.

[weierophinney]

This repository has been closed and moved to laminas/laminas-mail; a new issue has been opened at laminas/laminas-mail#14.

[weierophinney]

This repository has been moved to laminas/laminas-mail. If you feel that this patch is still relevant, please re-open against that repository, and reference this issue. To re-open, we suggest the following workflow:

• Squash all commits in your branch (git rebase -i origin/{branch})
• Make a note of all changed files (`git diff --name-only origin/{branch}...HEAD
• Run the laminas/laminas-migration tool on the code.
• Clone laminas/laminas-mail to another directory.
• Copy the files from the second bullet point to the clone of laminas/laminas-mail.
• In your clone of laminas/laminas-mail, commit the files, push to your fork, and open the new PR.
  We will be providing tooling via laminas/laminas-migration soon to help automate the process.