Can be disabled if and we implement DB_INIT_CDB + DB_INIT_MPOOL +
DB_CDB_ALLDB.

- Detects OpenLDAP 2.0 and builds correctly with it.
- Increment major version to 2, library file to libldaptcl2.0.so.
- Can now perform add/delete/replace modifications in a single command.
- Replaced calls to TclX_WrongArgs with core Tcl_WrongNumArgs to reduce
  dependency on Extended Tcl.
- Wrap dereference search control with #ifdef LDAP_OPT_DEREF.
- Deref during search should work.
- Add protocol_version option to ldap init command.
- Add LDAPTCL_PROTOCOL_VERSION_DEFAULT to allow specifying the default
  protocol version used.
- Add controlArray(timeout) to control timeouts during searches.
- Add controlArray(cache) to control caching current search results.
  (Experience has show this to be not very useful or not working correctly.
  Caching search results should probably be done in Ldaptcl rather than
  letting the LDAP API do it.)
- Add "compare" subcommand
- Add experimental trap subcommand (undocumented -- use at your own risk).

We don't support collective attributes (yet).
Remove exit() calls from scheme parsers.  Need to do same for acl parser.

to a stable specification.

of syntax.  RFC 1778/2252 are wrong and will need to be updated.

in back-meta/data and follow instructions.
minor update of "Changes" and "TODO".

Add TLS.sdf (needs to be written)
Reorder chapter

  - librewrite, for string rewriting; it may be used in back-ldap
    by configuring with '--enable-rewrite'. It must be used in
    back-meta. There's a text file, 'libraries/librewrite/RATIONALE',
    that explains the usage and the features. More comprehensive
    documentation will follow.
  - enhancements of back-ldap (ITS#989,ITS#998,ITS#1002,ITS#1054 and ITS#1137)
    including dn rewriting, a fix to group acl matching and so
  - back-meta: a new backend that proxies a set of remote servers
    by spawning queries. It uses portions of back-ldap and the rewrite
    capabilities of librewrite. It can be compiled by configuring
    with `--enable-ldap --enable-rewrite --enable-meta'.
    There's a text file, 'servers/slapd/back-meta/Documentation', that
    describes the main features and config statements.

Note: someone (Kurt?) should run 'autoconf' and commit 'configure' as
my autoconf version must be different: my configures contain a number
of differences and I didn't feel comfortable in adding them :)