Clarify purpose of nightly builds
Clarify purpose of nightly builds

git-svn-id: https://svn.apache.org/repos/asf/jakarta/jmeter/branches/rel-2-2@514428 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: 34b27c5a3248a876604623d01f4333064cdb4601
ham1/jmeter,ham1/jmeter,apache/jmeter,benbenw/jmeter,ham1/jmeter,etnetera/jmeter,apache/jmeter,benbenw/jmeter,etnetera/jmeter,ham1/jmeter,apache/jmeter,ham1/jmeter,etnetera/jmeter,etnetera/jmeter,apache/jmeter,etnetera/jmeter,benbenw/jmeter,apache/jmeter,benbenw/jmeter