c->req is set in client_read but never deallocated

I find it more readable with some empty lines here and there

Thanks Martin for providing these information :)

Add a cirrus CI config file that runs the regression suite on linux amd64/aarch64 and on freebsd.

While there, use it in the tests too

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 ...