package/lynx: add security patch for CVE-2021-38165

package/lynx: add security patch for CVE-2021-38165

Lynx through 2.8.9 mishandles the userinfo subcomponent of a URI, which
allows remote attackers to discover cleartext credentials because they may
appear in SNI data.

https://lists.nongnu.org/archive/html/lynx-dev/2021-08/msg00002.html

Upstream unfortunately does not provide a public VCS (only source
snapshots), so fetch the security patch from Debian.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>