Insert reference to ITS webpage

and back-ldbm are preserved, they only use the up-cased DNs. back-passwd
uses the mixed-case DN. All others are using mixed-case DN, may need more
fixing.

Let oc_check_allowed grok things like userCertificate;binary
oc_check_required should be fixed too.

Let at_find find the AttributeType that matches a given AttributeDescription.
Useful to deal with things like userCertificate;binary.

Add missing paren.

build/openldap.m4 and configure.in

	dn: cn=foo
	changetype: modify
	replace: bar
	-

configure.  Implementation is dependent upon autoconf internals.
Attempts to use AC_REVISION hammered by libtool bugs.  Will submit
reports to libtool camp and rework configure.in once fixes are
released.

	-C chase with prompting
	-CC chase without prompting
	-R don't chase
with defaults dependent upon authentication method used.
rebind callback also needs to be extended to support SASL and
provide information for prompting purposes.  Good intro project.

Replace old Id as needed (back-tcl).
Leave updating of contribWare to contributors (for now).