AUTOCOMMIT by gen-model-colls.sh script. Message: I forgot a crucial step: I need to rebuild *all* the GS3 model collections from scratch with the new PERL_HASH_SEED env var variable set to 0 (using the svndelete flag to gen-model-colls.sh script to delete the index and archives folders), in order to get a fair comparison with the test collections being tested over on the Windows machine