[Form] [Validator] Fixed post_max_size = 0 bug (Issue #8065)
merged branch odi86/check-post-max-size-zero (PR #8149)

This PR was merged into the 2.1 branch.

Discussion
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[Form] [Validator] Fixed post_max_size = 0 bug (issue #8065)

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #8065
| License       | MIT
| Doc PR        |

Commits
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2038329 [Form] [Validator] Fixed post_max_size = 0 bug (Issue #8065)