xmltooling: FTBFS with OpenSSL 3.0

Imported from Debian bug http://bugs.debian.org/1006581:

Source: xmltooling
Version: 3.2.1-1
Severity: important
Tags: bookworm sid
User: <email address hidden>
Usertags: ftbfs-3.0

Your package is failing to build using OpenSSL 3.0 with the
following error:

| make[5]: Entering directory '/<<PKGBUILDDIR>>/xmltoolingtest'
| ../build-aux/test-driver: line 112: 1662259 Segmentation fault "$@" >> "$log_file" 2>&1
| FAIL: xmltoolingtest
| =====================================================
| xmltooling 3.2.1: xmltoolingtest/test-suite.log
| =====================================================
|
| # TOTAL: 1
| # PASS: 0
| # SKIP: 0
| # XFAIL: 0
| # FAIL: 1
| # XPASS: 0
| # ERROR: 0
|
| .. contents:: :depth: 2
|
| FAIL: xmltoolingtest
| ====================
|
| Running cxxtest tests (125 tests)..1644903586 WARN XMLTooling.XMLHelper : DEPRECATED: attribute "ignoreCase" encountered in configuration. Use "caseSensitive".
| 1644903586 WARN XMLTooling.XMLHelper : DEPRECATED: attribute "ignoreCase" encountered in configuration. Use "caseSensitive".
| 1644903586 WARN XMLTooling.XMLHelper : DEPRECATED: attribute "ignoreCase" encountered in configuration. Use "caseSensitive".
| 1644903586 WARN XMLTooling.XMLHelper : Attribute "ignoreCase" and "caseSensitive" should not be used in the same element.
| .....1644903586 WARN DirectoryWalkerTest : Unable to open directory (invalid)
| ...........1644903586 ERROR XMLTooling.ParserPool : fatal error on line 2, column 10, message: invalid document structure
| .....1644903586 ERROR XMLTooling.XMLObject : no default builder installed, found unknown child element (test:UnknownElement)
| ..FAIL xmltoolingtest (exit status: 139)
|
| ============================================================================
| Testsuite summary for xmltooling 3.2.1
| ============================================================================
| # TOTAL: 1
| # PASS: 0
| # SKIP: 0
| # XFAIL: 0
| # FAIL: 1
| # XPASS: 0
| # ERROR: 0
| ============================================================================
| See xmltoolingtest/test-suite.log
| Please report to https://shibboleth.atlassian.net/jira
| ============================================================================
| make[5]: *** [Makefile:1172: test-suite.log] Error 1

For more information see:
https://www.openssl.org/docs/man3.0/man7/migration_guide.html

Sebastian