[FR] No way to disable the canonical header

[baronvertigovongrahamthesecondofsealand]

Description

There is no configuration to disable the canonical header. Sometimes there is a need to do so, without keeping an edited and unmaintained version of the plugin.

In SeoService.php:

public function injectCanonical ()
{
	list($field) = $this->_getElementAndSeoFields();

	Craft::$app->getResponse()->getHeaders()->add(
		'Link',
		'<' . $field->canonical . '>; rel="canonical"'
	);
}

This needs a configurable switch to toggle injection.

Additional info

• Craft version: 3.7.48
• SEO version: 3.7.4
• PHP version: 7.3.33
• Database driver & version: php7.3-mysql 7.3.33-4+ubuntu18.04.1+deb.sury.org+1, MySQL 5.7.38
• Other Plugins: