Backend documentation patch, version 1

================
Most of this text is taken from OpenLDAP.  The work of rewriting it
to manual pages is done by by Hallvard B. Furuseth and placed into
the public domain.  This software is not subject to any license of
the University of Oslo.
================

Hallvard B. Furuseth <h.b.furuseth@usit.uio.no>, April 2002.

ITS#1730: Misc typos in NEW_LOGGING code from Hallvard

tries to retrieve both the key and the data.

to allow chasing referrals using the same user's credentials.

- fix for the client caching code (cache is flushed after modifications
  rather than removing only the changed entry)

The code was submitted by Jeff Costlow <j.costlow@f5.com> under the
following terms:

Copyright 2002, F5 Networks, Inc, All rights reserved.
This software is not subject to any license of F5 Networks.

This is free software; you can redistribute and use it
under the same terms as OpenLDAP itself.

			================
Written by Hallvard B. Furuseth and placed into the public domain.
This software is not subject to any license of the University of Oslo.

ldbm api/types

ucdata-path, moduleload, modulepath. sasl-external-x509dn-convert has
been deleted from the code.

without NEW_LOGGING. Added logfile.

from NFC to NFKC in UTF8bvnormalize() and UTF8bvnormcmp()

Re: Untested patch: back-tcl used wrong types  (ITS#1719)

			================
Written by Hallvard B. Furuseth and placed into the public domain.
This software is not subject to any license of the University of Oslo.
			================

> I turned it into an automatic variable.

...and used a variable-length array.  That's a gcc extension, it is not
in ANSI C89.  (It is in C99 though.)  You seem to be compiling without
-pedantic:-)  Anyway, here is a patch to turn it back into ch_malloc(),
plus some README fixes

  deleted ldap_pvt_tls_get_peer()
  changed ldap_pvt_tls_get_peer_dn() to use ldap_X509dn2bv()
  added ldap_pvt_tls_get_my_dn()

normalized LDAP DNs now.

Changed dnDCEnormalize to dnX509normalize, added dnX509peerNormalize,
based on new ldap_X509dn2bv() etc.

working ifor Cyrus 2. (Both GSSAPI and EXTERNAL are broken at the moment.)

Here a patch for another:  A spurious `"' in back-ldbm.
From Hallvard.