Added Rotuter Variables for version 3.4

[gaurav-nelson]

Added Router variables for 3.4 #3090 (comment)

[adellape]

@gaurav-nelson This could probably use dedicated and online labels, considering #3090 and #3258 did?

[gaurav-nelson]

Thanks @adellape
@vikram-redhat can you please confirm?

[vikram-redhat]

@gaurav-nelson - Yes that is correct. It should have the online and dedicated labels and marked with future release.

[vikram-redhat]

@gaurav-nelson - might require a rev history. See: https://gitlab.cee.redhat.com/vigoyal/openshift-release-script#revision-history-format

[gaurav-nelson]

[rev_history]
|xref:../architecture/core_concepts/routes.adoc#architecture-core-concepts-routes[Core Concepts -> Routes]
|Added two new parameters under Configuration Parameters in the xref:../architecture/core_concepts/routes.adoc#haproxy-template-router[HAProxy Template Router] section.
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