Trac Ticket #338 - letters in object's cn get converted to
    lowercase when renaming object
    
    https://fedorahosted.org/389/ticket/338
    
    Fix description: The value of newrdn was normalized as dn then
    decapitalized.  The decapitalization was not just needed but
    the cause of the reported bug.
    
    This patch removes the decapitalization call (slapi_dn_ignore_case)
    and adds slapi_dn_ignore_case to acl_access_allowed_modrdn (acl.c)
    and referint_postop_modrdn (referint/referint.c).
    
    Additionally, unnecessary code is being removed from chaining_
    back_modrdn (chainingdb/cb_modrdn.c).