Added missing backend protocol.

[pentago]

As per https://kubernetes.github.io/ingress-nginx/user-guide/fcgi-services/

What this PR does / why we need it:

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Which issue/s this PR fixes

How Has This Been Tested?

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have added tests to cover my changes.
• All new and existing tests passed.

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[aledbf]

/ok-to-test

[aledbf]

@pentago please sign the CLA

[pentago]

@aledbf sure. Everything that could go wrong with signing CLA went wrong: https://i.imgur.com/kJnivzg.png
LF is such a clueless organization.

[pentago]

Okay, CLA signed and sent. Please check.

[aledbf]

/check-cla

[aledbf]

/lgtm
/approve

[aledbf]

@pentago thanks!

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf, pentago

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• OWNERS [aledbf]

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[pentago]

No @aledbf , thank you for all the work on the project!