Deep link checker try 2

See merge request !119 (merged) and its panic revert !124 (merged)

This yields in weird links to "German" pages with links to nowhere.

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(cherry picked from commit dd9d4345)

• 543228c7 Add deeplinkcheck.md
• a2b204f8 First comming: added links
• d350d7f9 Update deeplinkcheck.md
• 7bce5f94 added bad link for testing. urls seem to be not formatted as links
• 8e5cc240 Update deeplinkcheck.md
• 9fa6ab21 Update deeplinkcheck.md
• 73c61cdf deleted bad link