Changes to perl-ldap schema code

[Clif H. <ch...@po...>]

Attached are 4 patch files that hopefully will fix
several concerns about the perl-ldap module's ability
to pull schema information correctly.  These patch files
were generated from version .22.

I have tested these changes against my Openldap 2.0.7
server, my x.500 servers, and Netscape 4.x server.
There were no problems pulling the schema or rootDSE
information.

I have not had a chance to test this against an Exchange
server or Active Directory server.  I hopefully will be
able to do this in the very near future.

I have not tested the functions that decode matchingRuleUse,
dITStructureRules, dITContentRules, or nameForms because I 
do not have access to any servers that have these structures.

About the patch files.

LDAP.pm.patch ->  I modified the schema function to use the
correct filters and added the attrs option to retrieve all of
the attributes associated with the rootDSE and subschemaSubentry.

LDAP.pod.patch -> I added documentation about the schema function
and root_dse function.  I added examples to show how to use
the schema function to retrieve objectClasses and attributes. 
Once these are understood pulling the other attributes 
(matchingRules, etc) is easy to do.

I added examples to show how to use the root_dse function and
how to use the get_value method to retrieve rootDSE attribute
information.

Schema.pm.patch -> I added code to comprehend the 
matchingRuleUse, dITStructureRules, dITContentRules,
nameForms attributes.

Schema.pod.patch -> I added documentation on the functions
that determine object type and retrieve attribute data for
matchingRuleUse, dITStructureRules, dITContentRules,
nameForms attributes.
  
Regards,

Clif Harden          ch...@po...