Clarify different HTTP samplers
Clarify different HTTP samplers

git-svn-id: https://svn.apache.org/repos/asf/jakarta/jmeter/trunk@642262 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: 4426dd48927af84cbd83475e93791fa616d731c1
apache/jmeter,benbenw/jmeter,apache/jmeter,benbenw/jmeter,ham1/jmeter,ham1/jmeter,apache/jmeter,etnetera/jmeter,etnetera/jmeter,benbenw/jmeter,apache/jmeter,ham1/jmeter,apache/jmeter,ham1/jmeter,etnetera/jmeter,etnetera/jmeter,etnetera/jmeter,benbenw/jmeter,ham1/jmeter