PHP 8.1 | MigrationGuide/New constants: add missing constants [5]

While not mentioned anywhere at all, the commit to PHP itself adding support for the Sodium xchacha* functions, does declare a couple of new constants as well...

Refs:
* php/php-src#6868
* php/php-src@f7f1f7f#diff-3fe4027560fd299248af1dc1efe04287cc2b6418e8f01755c05c9db64b668b1eR352-R357

While not mentioned anywhere at all, the commit to PHP itself adding support for the Sodium ristretto255* functions, also declares a number of new constants as well...

Refs:
* php/php-src#6922
* php/php-src@9b794f8#diff-3fe4027560fd299248af1dc1efe04287cc2b6418e8f01755c05c9db64b668b1eR368-R381

Author: jrfnl

appendices/migration81/constants.xml

@@ -101,6 +101,37 @@
   </itemizedlist>
  </sect2>
 
+ <sect2 xml:id="migration81.constants.sodium">
+  <title>Sodium</title>
+
+  <itemizedlist>
+   <listitem>
+    <simpara><constant>SODIUM_CRYPTO_STREAM_XCHACHA20_NONCEBYTES</constant></simpara>
+   </listitem>
+   <listitem>
+    <simpara><constant>SODIUM_CRYPTO_STREAM_XCHACHA20_KEYBYTES</constant></simpara>
+   </listitem>
+   <listitem>
+    <simpara><constant>SODIUM_CRYPTO_SCALARMULT_RISTRETTO255_BYTES</constant></simpara>
+   </listitem>
+   <listitem>
+    <simpara><constant>SODIUM_CRYPTO_SCALARMULT_RISTRETTO255_SCALARBYTES</constant></simpara>
+   </listitem>
+   <listitem>
+    <simpara><constant>SODIUM_CRYPTO_CORE_RISTRETTO255_BYTES</constant></simpara>
+   </listitem>
+   <listitem>
+    <simpara><constant>SODIUM_CRYPTO_CORE_RISTRETTO255_HASHBYTES</constant></simpara>
+   </listitem>
+   <listitem>
+    <simpara><constant>SODIUM_CRYPTO_CORE_RISTRETTO255_SCALARBYTES</constant></simpara>
+   </listitem>
+   <listitem>
+    <simpara><constant>SODIUM_CRYPTO_CORE_RISTRETTO255_NONREDUCEDSCALARBYTES</constant></simpara>
+   </listitem>
+  </itemizedlist>
+ </sect2>
+
  <sect2 xml:id="migration81.constants.tokenizer">
   <title>Tokenizer</title>