Thread: pgsql: Prevent multiple archivers from starting.

Log Message:
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Prevent multiple archivers from starting.  Backpatch to 8.1.X.

Simon Riggs

Modified Files:
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    pgsql/src/backend/postmaster:
        pgarch.c (r1.20 -> r1.21)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/postmaster/pgarch.c.diff?r1=1.20&r2=1.21)