mod_http_upload: Fix issuing slots to components or other non-c2s sessions The 'full_jid' property only exists on local c2s sessions. This was not adjusted for in 0a56dc6c61af, so it did not work. Thanks Fren__ for highlighting the issue.

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    <script src="https://hcaptcha.com/1/api.js" async defer></script>
    <div class="h-captcha" data-sitekey="{captcha_public_key}"></div>
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