Fuzz testing

Fuzz targets are x509 crt csr and crl parsing
as well as private and public key parsing
and client and server communication

Fuzz targets for DTLS
Simple corpus with valid DTLS connection
Deterministic behavior for fuzzing, ie no timestamps
diff --git a/tests/fuzz/fuzz_server.options b/tests/fuzz/fuzz_server.options
new file mode 100644
index 0000000..4d7340f
--- /dev/null
+++ b/tests/fuzz/fuzz_server.options
@@ -0,0 +1,2 @@
+[libfuzzer]
+max_len = 1048575