dspace.cfg: Remove stuff we're not using

We're definitely not using the branded preview, and the item previews
come automatically in XMLUI.
config: Move to LDAP authentication
input-forms.xml: Add subregions
inptu-forms.xml: Remove duplicate AFRICA region
input-forms.xml: Fix line wrapping in input-forms

It turns out that tidy wraps long lines, and this messes with the
metadata values stored by DSpace.  We need to tell tidy not to wrap
long lines by adding '-w 0':
    tidy -xml -iq -m -w 0 input-forms.xml
config: Use subscope search for LDAP

We want to search in all forests in the hierarchy.
input-forms.xml: Add new ILRI subjects
input-forms.xml: Add Indian states to subregions
input-forms.xml: Add Anancy subject list
input-forms: Correct stored values for some ILRI subjects