-(D) add_files_recursive, pass 2: explicitly ignoring ${MAIL_DIR}/one/two/three/.git
-(D) add_files_recursive, pass 2: explicitly ignoring ${MAIL_DIR}/one/two/three/ignored_file
-(D) add_files_recursive, pass 2: explicitly ignoring ${MAIL_DIR}/one/two/ignored_file
-(D) add_files_recursive, pass 2: explicitly ignoring ${MAIL_DIR}/one/ignored_file