jodd-props/src/main/java/jodd/props/Props.java
public Props loadEnvironment(final String prefix) {
		final Map<String, String> environmentMap = System.getenv();
		load(environmentMap, prefix);
		return this;
	}
public Props loadEnvironment(final String prefix) {
		final Map<String, String> environmentMap = System.getenv();
		load(environmentMap, prefix);
		return this;
	}
Loads environment properties with given prefix.
If prefix is <code>null</code> it will not be used.