It may be a bit of an issue for both the displaying of the current value (in web ui for instance) and the inability to put said data in a flag on the commandline (unless command line would use base64 for instance)

• test that a confimap binaryData really ends up as binary once mounted
• add binary type with base64 for cli and no base64 for cmap (well... optionally... people might still prefer not having binary)
• special handling in configmap