LMDB 0.9.23:
Fix loose pages in dirty list
Fix mdb_load flag init
Fix mdb_env_close in forked process
Documentation
mdb_cursor_del doesn't invalidate cursor
GET_MULTIPLE etc don't change passed in key
Problems found with existing distfiles:
distfiles/D6.data.ros.gz
distfiles/cstore0.2.tar.gz
distfiles/data4.tar.gz
distfiles/sphinx-2.2.7-release.tar.gz
No changes made to the cstore or mariadb55-client distinfo files.
Otherwise, existing SHA1 digests verified and found to be the same on
the machine holding the existing distfiles (morden). All existing
SHA1 digests retained for now as an audit trail.