ext/sodium: Fix return-value prose for 4 encrypt/stream functions that throw SodiumException instead of returning false (#5655)

Author: lacatoire

reference/sodium/functions/sodium-crypto-aead-chacha20poly1305-encrypt.xml

@@ -63,7 +63,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <simpara>
-   Returns the ciphertext and tag on success, &return.falseforfailure;.
+   Returns the ciphertext and authentication tag as a string of raw binary bytes.
   </simpara>
  </refsect1>
 

reference/sodium/functions/sodium-crypto-aead-chacha20poly1305-ietf-encrypt.xml

@@ -66,7 +66,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <simpara>
-   Returns the ciphertext and tag on success, &return.falseforfailure;.
+   Returns the ciphertext and authentication tag as a string of raw binary bytes.
   </simpara>
  </refsect1>
 

reference/sodium/functions/sodium-crypto-aead-xchacha20poly1305-ietf-encrypt.xml

@@ -67,7 +67,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <simpara>
-   Returns the ciphertext and tag on success, &return.falseforfailure;.
+   Returns the ciphertext and authentication tag as a string of raw binary bytes.
   </simpara>
  </refsect1>
 

reference/sodium/functions/sodium-crypto-stream-xchacha20-xor-ic.xml

@@ -71,7 +71,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <simpara>
-   Encrypted message, &return.falseforfailure;.
+   Encrypted message.
   </simpara>
  </refsect1>