NIC Release 5.3.0

[danielnginx]

Tasks

• QE sign off - ensure that we are shipping without bugs, and we have the latest base OS images

• Security sign-off - ensure that we are not shipping any fixable CVE's and if we have CVE's they are documented, and internal security clearance is done

• Docs release notes & Changelog

• Release Operator

• Test and update NGINX Agent

• Test and update WAF and DOS

• Test and update NGINX R36