- Kubeadm: external etcd endpoints passed in the `ClusterConfiguration` that have Unicode characters are no longer IDNA encoded (converted to Punycode). They are now just URL encoded as per Go's implementation of RFC-3986, have duplicate "/" removed from the URL paths, and passed like that directly to the `kube-apiserver` `--etcd-servers` flag. If you have etcd endpoints that have Unicode characters, it is advisable to encode them in advance with tooling that is fully IDNA compliant....

unicode_letter = /* a Unicode code point categorized as "Letter" */ .
unicode_digit  = /* a Unicode code point categorized as "Number, decimal digit" */ .
</pre>

<p>
In <a href="https://www.unicode.org/versions/Unicode8.0.0/">The Unicode Standard 8.0</a>,
Section 4.5 "General Category" defines a set of character categories.
Go treats all characters in any of the Letter categories Lu, Ll, Lt, Lm, or Lo

pkg time, method (Duration) Milliseconds() int64
pkg unicode, const Version = "11.0.0"
pkg unicode, var Dogra *RangeTable
pkg unicode, var Gunjala_Gondi *RangeTable
pkg unicode, var Hanifi_Rohingya *RangeTable
pkg unicode, var Makasar *RangeTable
pkg unicode, var Medefaidrin *RangeTable
pkg unicode, var Old_Sogdian *RangeTable

pkg text/template/parse, type Mode uint
pkg text/template/parse, type Tree struct, Mode Mode
pkg unicode, const Version = "13.0.0"
pkg unicode, var Chorasmian *RangeTable
pkg unicode, var Dives_Akuru *RangeTable
pkg unicode, var Khitan_Small_Script *RangeTable
pkg unicode, var Yezidi *RangeTable
# all deprecations up to and including Go 1.16
pkg archive/tar, const TypeRegA //deprecated