nginx vulnerability

USN-5371-1 and USN-5371-2 fixed several vulnerabilities in nginx.
This update provides the corresponding update for CVE-2020-11724
for Ubuntu 16.04 ESM.

Original advisory details:

It was discovered that nginx Lua module mishandled certain inputs.
An attacker could possibly use this issue to perform an HTTP Request
Smuggling attack. This issue was fixed for Ubuntu 18.04 LTS and
Ubuntu 20.04 LTS. (CVE-2020-11724)

It was discovered that nginx Lua module mishandled certain inputs.
An attacker could possibly use this issue to disclose sensitive
information. This issue only affects Ubuntu 18.04 LTS and
Ubuntu 20.04 LTS. (CVE-2020-36309)

It was discovered that nginx mishandled the use of
compatible certificates among multiple encryption protocols.
If a remote attacker were able to intercept the communication,
this issue could be used to redirect traffic between subdomains.
(CVE-2021-3618)