bg worker: patch 5 of 6 - splitting

Markus Wanner <markus@bluegap.ch>

From: Markus Wanner <markus@bluegap.ch>
To: PostgreSQL-development Hackers <pgsql-hackers@postgresql.org>
Date: 2010-07-13T14:31:32Z
Lists: pgsql-hackers

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Splits the coordinator and background worker infrastructure code into 
separate source and header files, namely the additional coordinator.c 
and coordinator.h files, taking stuff from autovacuum.[ch]. Again, 
hopefully no functional change.