[httpx] Improper Input Validation in httpx

Encode OSS httpx <=1.0.0.beta0 is affected by improper input validation in httpx.URL, httpx.Client and some functions using httpx.URL.copy_with.

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-41945
• https://github.com/encode/httpx/issues/2184
• https://gist.github.com/lebr0nli/4edb76bbd3b5ff993cf44f2fbce5e571
• https://github.com/encode/httpx/discussions/1831
• https://github.com/encode/httpx/pull/2185
• https://github.com/encode/httpx
• https://github.com/advisories/GHSA-h8pj-cxx2-jfg2
• https://github.com/encode/httpx/releases/tag/0.23.0
• https://github.com/pypa/advisory-database/tree/main/vulns/httpx/PYSEC-2022-183.yaml