Removed tests with asyncio.

Fix ssl connection drop in asyncnet
Add tasyncssl test

tests/async/tasyncssl.nim

@@ -0,0 +1,66 @@
+discard """
+  file: "tasyncssl.nim"
+  cmd: "nim $target --hints:on --define:ssl $options $file"
+  output: "500"
+"""
+import asyncdispatch, asyncnet, net, strutils, os
+
+when defined(ssl):
+  var msgCount = 0
+
+  const
+    swarmSize = 10
+    messagesToSend = 50
+
+  var clientCount = 0
+
+  proc sendMessages(client: AsyncSocket) {.async.} =
+    for i in 0 .. <messagesToSend:
+      await send(client, "Message " & $i & "\c\L")
+
+  proc launchSwarm(port: Port) {.async.} =
+    for i in 0 .. <swarmSize:
+      var sock = newAsyncSocket()
+      var clientContext = newContext(verifyMode = CVerifyNone)
+      clientContext.wrapSocket(sock)
+      await connect(sock, "localhost", port)
+      await sendMessages(sock)
+      close(sock)
+
+  proc readMessages(client: AsyncSocket) {.async.} =
+    while true:
+      var line = await recvLine(client)
+      if line == "":
+        close(client)
+        inc(clientCount)
+        break
+      else:
+        if line.startswith("Message "):
+          inc(msgCount)
+        else:
+          doAssert false
+
+  proc createServer(port: Port) {.async.} =
+    let serverContext = newContext(verifyMode = CVerifyNone,
+                                   certFile = "../testdata/mycert.pem",
+                                   keyFile = "../testdata/mycert.pem")
+    var server = newAsyncSocket()
+    serverContext.wrapSocket(server)
+    server.setSockOpt(OptReuseAddr, true)
+    bindAddr(server, port)
+    server.listen()
+    while true:
+      let client = await accept(server)
+      serverContext.wrapConnectedSocket(client, handshakeAsServer)
+      asyncCheck readMessages(client)
+
+  asyncCheck createServer(Port(10335))
+  asyncCheck launchSwarm(Port(10335))
+  while true:
+    poll()
+    if clientCount == swarmSize: break
+
+  assert msgCount == swarmSize * messagesToSend
+  echo msgCount
+
+