* Changes tests so that they pass with draft-23
* BoringSSL interoperability: uses code at most recent commit. It uses
"-tls13-variant draft23" flag to indicate compatibility with draft23
* NSS interoperability: Uses release 3.35
* PicoTLS interoperability: blocked. Doesn't seem to implement draft23
* Uses updated bogo from
https://github.com/henrydcase/crypto-tls-bogo-shim
Goal of this PR is to rework testing script so that actual testing is
easy to extend and perform during development cycle.
* For interoperability testing I use python script and test framework,
instead of complicated bsah scripts. Script itself is not yet perfect
but it makes it much easier to extend tests and work with them during
development time
* Makefile has been extended and now includes all steps needed to build
the library and run tests. It's now possible to run any kind of tests
without exporting environment variables. Thanks to this change it is
stupid-easy to run any kind of tests.
* There are 3 kinds of tests implemented in the library - unittests,
interoperability tests and bogo. Travis has been changed and now
dashbord will show only results for those 3 targets.
