pgstatsinfo - pg_statsinfo: Fix bugs that autovacuum and checkpoint logs

Log Message:
-----------
Fix bugs that autovacuum and checkpoint logs cannot register instance id.

Modified Files:
--------------
    pg_statsinfo/bin:
        autovacuum.c (r1.3 -> r1.4)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatsinfo/pg_statsinfo/bin/autovacuum.c?r1=1.3&r2=1.4)
        checkpoint.c (r1.4 -> r1.5)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatsinfo/pg_statsinfo/bin/checkpoint.c?r1=1.4&r2=1.5)
        collector_sql.h (r1.4 -> r1.5)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatsinfo/pg_statsinfo/bin/collector_sql.h?r1=1.4&r2=1.5)
        pg_statsinfo.c (r1.5 -> r1.6)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatsinfo/pg_statsinfo/bin/pg_statsinfo.c?r1=1.5&r2=1.6)
        pg_statsinfo.h (r1.5 -> r1.6)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatsinfo/pg_statsinfo/bin/pg_statsinfo.h?r1=1.5&r2=1.6)
        pg_statsrepo.sql (r1.5 -> r1.6)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatsinfo/pg_statsinfo/bin/pg_statsrepo.sql?r1=1.5&r2=1.6)
        snapshot.c (r1.7 -> r1.8)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatsinfo/pg_statsinfo/bin/snapshot.c?r1=1.7&r2=1.8)
        writer.c (r1.7 -> r1.8)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatsinfo/pg_statsinfo/bin/writer.c?r1=1.7&r2=1.8)
        writer_sql.h (r1.3 -> r1.4)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatsinfo/pg_statsinfo/bin/writer_sql.h?r1=1.3&r2=1.4)
    pg_statsinfo/bin/pgut:
        pgut.c (r1.3 -> r1.4)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatsinfo/pg_statsinfo/bin/pgut/pgut.c?r1=1.3&r2=1.4)
    pg_statsinfo/lib:
        libstatsinfo.c (r1.6 -> r1.7)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgstatsinfo/pg_statsinfo/lib/libstatsinfo.c?r1=1.6&r2=1.7)