We ended up copying too much data from the fastcgi process.

It's now possible to run only a subset of the tests with: ./runtime test1 test2 ...

The tests are still there, the suite is equivalent to the old one, but this one is better structured. The biggest annoyance I had with the old one was that it wasn't straightforward to test only a specific set of tests. It's still impossible, but it's way easier to do it now. This extract all the tests to their own functions. It's overall better in all possible regards.

libevent2 has this concept of "freezeness" of a buffer. It's a way to avoid accidentally write/remove data from the wrong "edge" of the buffer. The client_tls_{read,write} functions need to add/drain data from the opposite edge, hence the need for the unfreeze call. This is the minimum change in order to work on libevent2 too. Another way would be to define evbuffer_{un,}freeze as NOP on libevent 1, but it's ugly IMHO.

* add configure check * change the way the headers are required (copied from tmux)

* we don't add a space before the lang anymore * we're more strict in CGI handling: the `invalid' CGI script now triggers a 42 CGI ERROR

This is a big change in how gmid handles I/O. Initially we used a hand-written loop over poll(2), that then was evolved into something powered by libevent basic API. This meant that there were a lot of small "asynchronous" function that did one step, eventually scheduling the re-execution, that called each others in a chain. The new implementation revolves completely around libevent' bufferevents. It's more clear, as everything is implemented around the client_read and client_write functions. There is still space for improvements, like adding timeouts for one, but it's solid enough to be committed as is and then further improved.

We can't use normal pipe(2)s with libevent in some cases. Switch to socketpair(2), which doesn't have the same problem. This has the drawback that it doesn't prevent the CGI script from reading stdout, for instance. (sockets are two-way, pipes only one-way)

add the reported request id if there's a mismatch and both the gai error and the errno value if getnameinfo fails.