pg_upgrade; change major version comparisons to use <=, not <

Bruce Momjian <bruce@momjian.us>

Commit: 2cb4b8e0ae16e7091a7bd5cf94f21d2719b108e0
Author: Bruce Momjian <bruce@momjian.us>
Date: 2020-10-06T16:12:09Z
Releases: 13.1
pg_upgrade;  change major version comparisons to use <=, not <

This makes checking for older major versions more consistent.

Backpatch-through: 9.5

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