Rework the thread sizing paragraph in best-practices.
Rework the thread sizing paragraph in best-practices.

git-svn-id: 5ccfe34f605a6c2f9041ff2965ab60012c62539a@1624741 13f79535-47bb-0310-9956-ffa450edef68

etnetera/jmeter,tuanhq/jmeter,ra0077/jmeter,liwangbest/jmeter,d0k1/jmeter,max3163/jmeter,liwangbest/jmeter,d0k1/jmeter,fj11/jmeter,ubikfsabbe/jmeter,hizhangqi/jmeter-1,liwangbest/jmeter,etnetera/jmeter,hemikak/jmeter,vherilier/jmeter,thomsonreuters/jmeter,vherilier/jmeter,tuanhq/jmeter,vherilier/jmeter,kschroeder/jmeter,ubikloadpack/jmeter,irfanah/jmeter,max3163/jmeter,ra0077/jmeter,kyroskoh/jmeter,DoctorQ/jmeter,ra0077/jmeter,ThiagoGarciaAlves/jmeter,ubikloadpack/jmeter,hemikak/jmeter,fj11/jmeter,hemikak/jmeter,fj11/jmeter,kyroskoh/jmeter,max3163/jmeter,ubikfsabbe/jmeter,kschroeder/jmeter,d0k1/jmeter,kyroskoh/jmeter,vherilier/jmeter,ThiagoGarciaAlves/jmeter,kschroeder/jmeter,max3163/jmeter,tuanhq/jmeter,DoctorQ/jmeter,DoctorQ/jmeter,thomsonreuters/jmeter,ubikloadpack/jmeter,hizhangqi/jmeter-1,thomsonreuters/jmeter,irfanah/jmeter,ra0077/jmeter,etnetera/jmeter,d0k1/jmeter,ubikfsabbe/jmeter,ubikloadpack/jmeter,hizhangqi/jmeter-1,irfanah/jmeter,ThiagoGarciaAlves/jmeter,etnetera/jmeter,hemikak/jmeter,etnetera/jmeter,ubikfsabbe/jmeter