The Apache Santuario library has been upgraded to version 2.1.4. As a result, a new system property `com.sun.org.apache.xml.internal.security.parser.pool-size` has been introduced.

This new system property sets the pool size of the internal `DocumentBuilder` cache used when processing XML Signatures. The function is equivalent to the `org.apache.xml.security.parser.pool-size` system property used in Apache Santuario and has the same default value of 20.