More tweaks to the schema.
More tweaks to the schema.

* subversion/libsvn_wc/wc-metadata.sql:
  (WCROOT): local_abspath is NOT NULL. we simply will not insert a row if
    the metadata is stored within the root.
  (NODE): allow NULL for the wc_id, implying the metadata is at the
    wcroot. add a parent_id so that we can easily fetch all child nodes of
    a given node.
  (I_PATH): update columns for the path-based lookup index
  (I_NODELIST): renamed to ...
  (I_PARENT): ... this, and the column fixed.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion