pg-migrator - pg_migrator: Support new backend API to preserve

Log Message:
-----------
Support new backend API to preserve relfilenodes, avoiding complex toast
renaming for 8.5.

Modified Files:
--------------
    pg_migrator/func:
        Makefile (r1.4 -> r1.5)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/func/Makefile?r1=1.4&r2=1.5)
        pg_migrator_sysoids.c (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/func/pg_migrator_sysoids.c?r1=1.2&r2=1.3)
    pg_migrator/src:
        pg_migrator.c (r1.85 -> r1.86)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/pg_migrator.c?r1=1.85&r2=1.86)
        pg_migrator.h (r1.87 -> r1.88)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/pg_migrator.h?r1=1.87&r2=1.88)
        relfilenode.c (r1.35 -> r1.36)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/relfilenode.c?r1=1.35&r2=1.36)

Removed Files:
-------------
    pg_migrator/func:
        pg_migrator.c
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/func/pg_migrator.c)