[Dillo-dev] limit number of concurrent connections

Hi, Here's a prototype patch that does the work. It's not yet optimized nor polished nor throughly tested, and it leaks Web structures, but it illustrates very well the idea, and finishing it shouldn't be hard. As said in CCCwork.txt it would be good to build the whole chain in one single step (for simplicity) and to define a standard way to end/abort the CCC (which I've given some thought). If muses decide to pay me a visit, I may develop a patch for this soon. :-) -- Cheers Jorge.-