pgsql: Mark a few functions as static or NOT_USED.

Log Message:
-----------
Mark a few functions as static or NOT_USED.

Modified Files:
--------------
    pgsql/src/backend/commands:
        opclasscmds.c (r1.47 -> r1.48)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/opclasscmds.c.diff?r1=1.47&r2=1.48)
    pgsql/src/backend/rewrite:
        rewriteDefine.c (r1.110 -> r1.111)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/rewrite/rewriteDefine.c.diff?r1=1.110&r2=1.111)
    pgsql/src/bin/pg_dump:
        pg_backup_archiver.c (r1.133 -> r1.134)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup_archiver.c.diff?r1=1.133&r2=1.134)
        pg_backup_archiver.h (r1.71 -> r1.72)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup_archiver.h.diff?r1=1.71&r2=1.72)
        pg_backup_db.c (r1.72 -> r1.73)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup_db.c.diff?r1=1.72&r2=1.73)
        pg_backup_db.h (r1.12 -> r1.13)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup_db.h.diff?r1=1.12&r2=1.13)
    pgsql/src/bin/psql:
        command.c (r1.170 -> r1.171)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/command.c.diff?r1=1.170&r2=1.171)
        command.h (r1.26 -> r1.27)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/command.h.diff?r1=1.26&r2=1.27)
    pgsql/src/include/commands:
        defrem.h (r1.74 -> r1.75)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/commands/defrem.h.diff?r1=1.74&r2=1.75)