Add News24

[legoktm]

And move techcrunch.com and tv2.dk to exempt list.

Fixes #200.

Status

Ready for review

Review Checklist

• [x] Changes to onboarded.txt are accurate
• [x] The file default.rulesets.TIMESTAMP.gz has been updated, extracting that file and inspecting the contents of the JSON file produces the expected rules
• [x] The ruleset has been verified by modifying the HTTPS Everywhere configuration in a Tor Browser instance pointing to Path Prefix: https://raw.githubusercontent.com/freedomofpress/securedrop-https-everywhere-ruleset/$BRANCH_NAME
• [x] index.html has been updated using ./update_index.sh

Post-Deployment Checklist

• [x] Added/modified onion names have been updated in the SecureDrop Directory

[nathandyer]

Thanks for knocking this out so fast @legoktm! LGTM!