CLSA-2026-1778768341 python: Fix of 4 CVEs

CVE-2019-9740: reject control characters in HTTP URL paths in httplib.HTTPConnection.putrequest to prevent CRLF header injection - CVE-2019-18348: reject control characters in hostnames in httplib.HTTPConnection.init via a new validatehost helper to prevent CRLF header injection the glibc...