Thread: pgsql: Fix initdb's logic for picking shared_buffers/max_fsm_pages,

Log Message:
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Fix initdb's logic for picking shared_buffers/max_fsm_pages, which had
gotten rather thoroughly whacked out by careless recent changes: the
intended ratio between the two was off by a lot, and the minimum number
of shared buffers tried had increased by a lot.  Problem exposed by
failures on buildfarm members with smaller SHMMAX values.

Modified Files:
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    pgsql/src/bin/initdb:
        initdb.c (r1.124 -> r1.125)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/initdb/initdb.c.diff?r1=1.124&r2=1.125)