Added support for a 'Priority' attribute on cookies.
Better formatting.
Added tests around the Priority attribute of cookies.
Peroperly use the maxThreads specified in a TCPServerParameters to have the TCPServerDispatcher create a Threadpool with the correct capacity.
Refinement to ThreadPool::addCapacity() usage in TCPServer
Merge pull request #400 from karlr42/develop

Support for Priority attribute in Cookies / TCPServer improvments.