Add OpenSSL 1.1.0 support #5000

Add a simple online test

tests/untestable/tssl.nim

@@ -0,0 +1,36 @@
+#
+#            Nim - SSL integration tests
+#        (c) Copyright 2017 Nim contributors
+#
+#    See the file "copying.txt", included in this
+#    distribution, for details about the copyright.
+#
+## Warning: this test performs external networking.
+##
+## Test with:
+## ./bin/nim c -d:ssl -p:. -r tests/untestable/tssl.nim
+## ./bin/nim c -d:ssl -p:. --dynlibOverride:ssl --passL:-lcrypto --passL:-lssl -r tests/untestable/tssl.nim
+## The compilation is expected to succeed with any new/old version of OpenSSL,
+## both with dynamic and static linking.
+## The "howsmyssl" test is known to fail with OpenSSL < 1.1 due to insecure
+## cypher suites being used.
+
+import httpclient, os
+from strutils import contains, toHex
+
+from openssl import getOpenSSLVersion
+
+when isMainModule:
+  echo "version: 0x" & $getOpenSSLVersion().toHex()
+
+  let client = newHttpClient()
+  # hacky SSL check
+  const url = "https://www.howsmyssl.com"
+  let report = client.getContent(url)
+  if not report.contains(">Probably Okay</span>"):
+    let fn = getTempDir() / "sslreport.html"
+    echo "SSL CHECK ERROR, see " & fn
+    writeFile(fn, report)
+    quit(1)
+
+  echo "done"