Rename pg_upgrade 'log' to 'log_opts', to avoid platform naming conflict.

Bruce Momjian <bruce@momjian.us>

Commit: 691a67b922f2e8374356215228700958165e7d44
Author: Bruce Momjian <bruce@momjian.us>
Date: 2010-10-20T02:31:17Z
Releases: 9.1.0
Rename pg_upgrade 'log' to 'log_opts', to avoid platform naming conflict.

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