Clarify Keystore config
Clarify Keystore config

git-svn-id: https://svn.apache.org/repos/asf/jmeter/trunk@1341966 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: 3390fc66cbbff48d1b495701695d24a76580f2ec
ham1/jmeter,benbenw/jmeter,etnetera/jmeter,benbenw/jmeter,ham1/jmeter,ham1/jmeter,ham1/jmeter,apache/jmeter,etnetera/jmeter,ham1/jmeter,etnetera/jmeter,apache/jmeter,benbenw/jmeter,benbenw/jmeter,apache/jmeter,apache/jmeter,etnetera/jmeter,apache/jmeter,etnetera/jmeter