Thread: pgsql: Fix assorted memory leaks in pg_hba.conf parsing.

Log Message:
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Fix assorted memory leaks in pg_hba.conf parsing.  Over a sufficiently
large number of SIGHUP cycles, these would have run the postmaster out
of memory.  Noted while testing memory-leak scenario in postgresql.conf
configuration-change-printing patch.

Tags:
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REL8_4_STABLE

Modified Files:
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    pgsql/src/backend/libpq:
        hba.c (r1.188 -> r1.188.2.1)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/libpq/hba.c?r1=1.188&r2=1.188.2.1)