use getsystemvalue-functions in Mailer.php

[szaimen]

Fix #38957

[szaimen]

/backport to stable27

[szaimen]

/backport to stable26

[szaimen]

Maybe?

Suggested change

	$mailSmtpsecure = ($this->config->getSystemValue('mail_smtpsecure', null) === 'ssl') ? true : null;
	$mailSmtpsecure = ($this->config->getSystemValueString('mail_smtpsecure', '') === 'ssl') ? true : null;

[szaimen]

Maybe?

Suggested change

	$streamingOptions = $this->config->getSystemValue('mail_smtpstreamoptions', []);
	$streamingOptions = (array)$this->config->getSystemValue('mail_smtpstreamoptions', []);

[backportbot-nextcloud]

The backport to stable26 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable26
git pull origin stable26

# Create the new backport branch
git checkout -b fix/foo-stable26

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts. Resolve them.
git cherry-pick abc123

# Push the cherry pick commit to the remote repository and open a pull request
git push origin fix/foo-stable26

More info at https://docs.nextcloud.com/server/latest/developer_manual/getting_started/development_process.html#manual-backport

[szaimen]

/backport to stable26

[backportbot-nextcloud]

The backport to stable26 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable26
git pull origin stable26

# Create the new backport branch
git checkout -b fix/foo-stable26

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts. Resolve them.
git cherry-pick abc123

# Push the cherry pick commit to the remote repository and open a pull request
git push origin fix/foo-stable26

More info at https://docs.nextcloud.com/server/latest/developer_manual/getting_started/development_process.html#manual-backport

[szaimen]

#39006