Ensure apiserver role can only be used on AWS (because of firewalling)
Apply api-server label to CP as well
Consolidate node not ready validation message
Guard apiserver nodes with a feature flag
Rename Apiserver role to APIServer
Add an integration test for apiserver nodes
Rename Apiserver role to APIServer
Enumerate all roles in rolling update docs
Apply suggestions from code review
Co-authored-by: Steven E. Harris <seh@panix.com>
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