squid security update

[7:3.5.20-17.4]

• Resolves: #1872349 - CVE-2020-24606 squid: Improper Input Validation could
  result in a DoS
• Resolves: #1872327 - CVE-2020-15810 squid: HTTP Request Smuggling could
  result in cache poisoning
• Resolves: #1872342 - CVE-2020-15811 squid: HTTP Request Splitting could
  result in cache poisoning
  [7:3.5.20-17.2]
• Resolves: #1802516 - CVE-2020-8449 squid: Improper input validation issues
  in HTTP Request processing
• Resolves: #1802515 - CVE-2020-8450 squid: Buffer overflow in a Squid acting
  as reverse-proxy
• Resolves: #1853129 - CVE-2020-15049 squid: request smuggling and poisoning
  attack against the HTTP cache
• Resolves: #1802517 - CVE-2019-12528 squid: Information Disclosure issue in
  FTP Gateway
  [7:3.5.20-17]
• Resolves: #1828361 - CVE-2020-11945 squid: improper access restriction upon
  Digest Authentication nonce replay could lead to remote code execution
• Resolves: #1828362 - CVE-2019-12519 squid: improper check for new member in
  ESIExpression::Evaluate allows for stack buffer overflow [rhel
  [7:3.5.20-16]
• Resolves: #1738582 - CVE-2019-12525 squid: parsing of header
  Proxy-Authentication leads to memory corruption