static private String findVespaUser(String defUser) {
        Optional<String> vespaUserEnv = Optional.ofNullable(System.getenv("VESPA_USER"));
        if (! vespaUserEnv.isPresent()) {
            log.fine("VESPA_USER not set, using "+defUser);
            return defUser;
        }
        return vespaUserEnv.get().trim();
    }
The defaults of basic Vespa configuration variables.
Use Defaults.getDefaults() to access the defaults of this runtime environment.

@author arnej27959
@author bratseth
defaults/src/main/java/com/yahoo/vespa/defaults/Defaults.java