nginx:1.20 security update

nginx is a web and proxy server supporting HTTP and other protocols, with a
focus on high concurrency, performance, and low memory usage.

The following packages have been upgraded to a later upstream version: nginx
(1.20.1).

Security Fix(es):

* nginx: Off-by-one in ngx_resolver_copy() when labels are followed by a
pointer to a root domain name (CVE-2021-23017)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE page(s)
listed in the References section.

CVE-2021-23017
A security issue in nginx resolver was identified, which might allow an attacker
who is able to forge UDP packets from the DNS server to cause 1-byte memory
overwrite, resulting in worker process crash or potential other impact.

Modularity name: nginx
Stream name: 1.20