disable fragile parts of thttpclient.nim

tests/stdlib/thttpclient.nim

@@ -104,15 +104,17 @@ proc syncTest() =
 
   client.close()
 
-  # Timeout test.
-  client = newHttpClient(timeout = 1)
-  try:
-    resp = client.request("http://example.com/")
-    doAssert false, "TimeoutError should have been raised."
-  except TimeoutError:
-    discard
-  except:
-    doAssert false, "TimeoutError should have been raised."
+  when false:
+    # Disabled for now because it causes troubles with AppVeyor
+    # Timeout test.
+    client = newHttpClient(timeout = 1)
+    try:
+      resp = client.request("http://example.com/")
+      doAssert false, "TimeoutError should have been raised."
+    except TimeoutError:
+      discard
+    except:
+      doAssert false, "TimeoutError should have been raised."
 
 proc makeIPv6HttpServer(hostname: string, port: Port): AsyncFD =
   let fd = newNativeSocket(AF_INET6)