https://book.hacktricks.xyz/pentesting-web/http-request-smuggling#probing-http-request-smuggling-vulnerabilities
https://github.com/NafisiAslH/KnowledgeSharing/blob/main/CyberSecurity/Web/BountyStory/RequestSmuggling/20220620%20-%20Mass%20Account%20Takeovers%20using%20HTTP%20Request%20Smuggling.md