Apache XML Security for Java 1.2.1 release notes

• Clean unused build*.xml files.
• Clean unused jar (xmlParserAPI.jar,etc) and check and stored new versions.
• Generated the dist jar with version (i.e. xmlsec-1.2.1.jar instead of plain xmlsec.jar).
• Fix a memory leak when using xpath or using ResourceResolver and not hitting getElementByIdUsingDOM(). See Issue 32836.
• Fix erroneous creation/verification when using XPath2Filter and inclusive c14n.
• Library now throws an exception when asked to sign/verify an inexistent fragment. See Issue 23554.
• Restore reset behaviour as default when reusing Canonicalizers(but an append one can still be used).
• Fix a bug when using base64transformation and external resources. See Issue 33393.
• Fix a bug when passing XMLsignatureInput(InputStream) streams that don't acknowledge reset() as expected.
• Added i14n Base64 error message. See Issue 32996.