Important: #94615 - Fluid view helpers f:link.external and f:uri.external use https by default 

See forge#94615

Description 

When using the Fluid view helpers f:uri.external or f:link.external without an explicitly specified scheme, the target link now uses https instead of http .

Given the following Fluid snippets:

<f:link.external uri="www.some-domain.tld">some content</f:link.external>
<f:uri.external uri="www.some-domain.tld" />
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The result before:

<a href="http://www.some-domain.tld">some content</a>
http://www.some-domain.tld
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New result:

<a href="https://www.some-domain.tld">some content</a>
https://www.some-domain.tld
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If the new default can not be used, the http scheme needs to be specified. Examples:

<f:link.external uri="http://www.some-domain.tld">some content</f:link.external>
<f:link.external uri="www.some-domain.tld" defaultScheme="http">some content</f:link.external>
<f:uri.external uri="http://www.some-domain.tld" />
<f:uri.external uri="www.some-domain.tld" defaultScheme="http" />
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