* kubeadm: fix wrong default value for the "upgrade node --certificate-renewal" flag. ([#83528](https://github.com/kubernetes/kubernetes/pull/83528), [@neolit123](https://github.com/neolit123))
* IP validates if a string is a valid IP address ([#83104](https://github.com/kubernetes/kubernetes/pull/83104), [@zouyee](https://github.com/zouyee))

- To enhance usability and developer experience, CRD validation rules now support direct use of (CEL) reserved...

Eine weitere wichtige Funktion, benötigt von APIs, ist die Datenvalidierung, welche sicherstellt, dass die Daten unter gegebenen Umständen gültig sind. Zum Beispiel, dass ein Feld ein `int` ist und kein zufälliger String. Das ist besonders nützlich für hereinkommende Daten.

ten?ude?vog??c??c!.&ah?bh?c&a?s??d&5xq55--nx?g?s?uolcpanqym,?e&h?tisavnac.ym,?g&la0do--nx?ro??h&a?q?s!.sa,??i&7a0oi--nx?h??j&b?f?t?x?z??kh?l&h?im?j??m&n?oc!.&rekamegas.1-&htron-nc.&koobeton,oiduts,?tsewhtron-nc.&koobeton,oiduts,??s&ecivresbewnozama.no.1-&htron-nc.ppabew-refsnart,tsewhtron-nc.ppabew-refsnart,?wanozama.&1-&htron-nc.&3s,adbmal-tcejbo-3s,d&etacerped-3s,orp-&iupparme,oidutsrme,skoobetonrme,??etisbew-3s,ipa-etucexe,kcatslaud.&3s,etisbew-3s,tniopssecca-3s,?tniopssecca-3s,?tsewhtron-nc....

#     release_cpu_windows:             Toolchain and CUDA options for Windows CPU builds.
# LINT.IfChange
# Default build options. These are applied first and unconditionally.

# These are used to generate the ML wheel version string.
# See the explanation in the file comment of
# @local_xla//third_party/py/python_wheel.bzl.
# The generated version suffix is used in
# third_party/tensorflow/core/public/release_version.h and

- The client label for apiserver_request_count and apiserver_request_total now no-opts and merely records an empty string. ([#87673](https://github.com/kubernetes/kubernetes/pull/87673), [@logicalhan](https://github.com/logicalhan)) [SIG API Machinery, Instrumentation and Scalability]


<!-- NEW RELEASE NOTES ENTRY -->


# v1.15.9

"ta", "te", "tes", "toi", "ton", "tu", "un", "une", "vos", "votre", "vous", "c", "d", "j", "l", "à", "m", "n", "s", "t", "y", "été", "étée", "étées", "étés", "étant", "suis", "es", "est", "sommes", "êtes", "sont", "serai", "seras", "sera", "serons", "serez", "seront", "serais", "serait", "serions", "seriez", "seraient", "étais", "était", "étions", "étiez", "étaient", "fus", "fut", "fûmes", "fûtes", "furent", "sois", "soit", "soyons", "soyez", "soient", "fusse", "fusses", "fût", "fussions", "fussiez",...

"ta", "te", "tes", "toi", "ton", "tu", "un", "une", "vos", "votre", "vous", "c", "d", "j", "l", "à", "m", "n", "s", "t", "y", "été", "étée", "étées", "étés", "étant", "suis", "es", "est", "sommes", "êtes", "sont", "serai", "seras", "sera", "serons", "serez", "seront", "serais", "serait", "serions", "seriez", "seraient", "étais", "était", "étions", "étiez", "étaient", "fus", "fut", "fûmes", "fûtes", "furent", "sois", "soit", "soyons", "soyez", "soient", "fusse", "fusses", "fût", "fussions", "fussiez",...

hitespace","rcomma","rleadingCombinator","rdescend","rpseudo","ridentifier","matchExpr","ID","CLASS","TAG","ATTR","PSEUDO","CHILD","bool","needsContext","rinputs","rheader","rquickExpr","rsibling","runescape","funescape","escape","nonHex","high","String","fromCharCode","unloadHandler","setDocument","inDisabledFieldset","addCombinator","disabled","dir","next","childNodes","e","els","find","seed","m","nid","match","groups","newSelector","newContext","exec","getElementById","id","getElementsByTagNa...

- Kubectl can now use http caching for the OpenAPI schema. The cache
  directory can be configured by passing the `--cache-dir` command line flag to kubectl.
  If set to an empty string, caching is disabled.

- Kubectl now performs validation against OpenAPI schema instead of Swagger 1.2. If
  OpenAPI is not available on the server, it falls back to the old Swagger 1.2.