## Validator Changes
* Security Fix: Move all instantiation of transformerFactory to XMLUtils and set ACCESS_EXTERNAL flags automatically (slightly improvement to output message, but closes possible attack vector)
* Handle 308 redirects when fetching packages
* Fix NPE in ValueSetValidator
* Fix for NPE in IGLoader
* fix version conversion problem for ConceptMap (4<->5): relationship comment getting lost for noMap entries
* Add check for multiple WG extensions (HL7 context)
## Other code changes
* Suppress spurious logging statement
* Add Australian CDA name prefix & uri to mapping transform code
* Add new messages for tx.fhir.org
* Remove narrative from snapshot tests
* Improve complex extension rendering when rendering by profile
* Rewrite processing of map statements when generating snapshots to fix known bugs
* Updates to Capability Statement rendering (and minor Operation Definition rendering improvement)
* Fix wrong reference to CDA classes for unscoped class names
* fix rendering issue for R4 relationship codes in ConceptMap
* rework decimal lowBoundary() and highBoundary() after discussion on Zulip, and add extensive testing
* Fix existing test case for fixed up boundary handling in FHIRPath
* Add CodeSystem fetching for selected code systems for VSAC import
* Drop to saxon 11.6 for now
* fix issue with json unicode whitespace enscaping
* get Java generator running again (though no code regenerated)
* don't escape unicode whitespace in json files
* Fix NPE in questionnaire renderer
* Hack workaround for R4 issue with ProcessPriority
* Rewrite concurrency management for file system package cache
***NO_CI***
* WIP on do-20240722-thread-safety
* Try lock downgrading for better performance
* Refactor FilesystemPackageCacheLockManager
* Tidy up spacing.
* Refactor initCacheFolder. Change read lock to stop asking for a write lock
* Clean up version in addPackageToCache
Since we run checkValidVersionString, version will never be null, and can be final. Also, everything else can be final.
* Make an even crash-ier test for the FilesystemPackageManager
* Move read lock starting point to beginning of addPackageToCache
* Code cleanup
* More code cleanup + enhanced test + more locks
* More aggressive testing + bug fixes and lock file creation
* Basic checks and creation for lockfile
* More testing + smarter check for lock file
* Some renaming and code cleanup
* Some more general tests
* Check whole cache write lock (instantiating)
* Fix references to local files
* A little less repetition than that...
* Fix unclosed channel causing windows failure
* Fix file sync issues when writing .index.json files + others
* Add TRUNCATE_EXISTING and WRITE open options (fix overwrite behavior)
* Revert "Add TRUNCATE_EXISTING and WRITE open options (fix overwrite behavior)"
This reverts commit cfed736cd6.
* Revert "Fix file sync issues when writing .index.json files + others"
This reverts commit 4daf7feb93.
* Some additional test coverage, since I already wrote it.
* Don't build indexes implicitly during reads.
* Woops. Forgot that a directory can disappear via deletion
* Remove larger package
* Clean up code + remove System.out chatter
* Remove long running test (is tested elsewhere) + clean up code