~drizzle-trunk/drizzle/development

803 by Brian Aker
Refactored all current scheduler to be behind scheduler plugin api.
1
DRIZZLE_STORAGE_ENGINE(pool_of_threads,  pool_of_threads, [Pool of Threads Scheduler], [Pool of Threads Scheduler])
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DRIZZLE_PLUGIN_STATIC(pool_of_threads,   [libpool_of_threads.la])
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DRIZZLE_PLUGIN_MANDATORY(pool_of_threads)  dnl Default