* Added ECC and RSA intermediate CA's and server/client chain certificates for testing.
* Enhanced suites test to support expected fail arg `-H exitWithRet` in any test .conf file.
* Added new `test-altchains.conf` for testing with `WOLFSSL_ALT_CERT_CHAINS` defined.
* Added new `test-chains` for testing chains.
* Added new `test-dhprime.conf` for DH prime check tests.
* Added new `test-trustedpeer.conf` for testing `WOLFSSL_TRUST_PEER_CERT`.
* Refactor to add `-2` to disable DH prime check by default (except for new test-dhprime.conf).
* Added ability to run a specific test.conf file using syntax like `./tests/unit.test tests/test-altchains.conf`.
David Garske