OpenACS

- made XOTcl2 based implementation of site-nodes usable during

 initial bootstrap

- made new site-node cache implementation working for Oracle

- now, the same code works during bootstrap, for PostgreSQL and Oracle

 and independent of xotcl-core being installed or not.

- removed old and broken nsv-based site-node cache

- reduced need of .xql files (removed query for delete.delete_site_node)

- moved deprecated calls to deprecated-procs.tcl

This change make the code much clearer and eases maintenance and debugging.

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