- Move to seperate model

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Caused by not call SocketAsyncEventArgs.Dispose().

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Now it will close all existing TCP relay connections
while reloading the listener.

Signed-off-by: noisyfox <timemanager.rick@gmail.com>

To prevent "The IAsyncResult object was not returned from
the corresponding asynchronous method on this class." exception.

Signed-off-by: noisyfox <timemanager.rick@gmail.com>

To avoid unreadable and uncessary output

Signed-off-by: noisyfox <timemanager.rick@gmail.com>

At that time the remote even doesn't exist.
Also this debug output doesn't make any sense because when handling
udp request, this tcp connection won't have any meaningful data.
So I simply removed these two lines.

Signed-off-by: noisyfox <timemanager.rick@gmail.com>

-Use dual-mode socket & DnsEndPoint to handle all domain name connection.
-Move all socket creation into one single function.

So that we could treat domain name just like ipv4 & ipv6 address.
This also solves the async domain solving problem because the os will
hanlde it for us.

Signed-off-by: noisyfox <timemanager.rick@gmail.com>

Fix wrong output in proxyConnectTimer_Elapsed.

Signed-off-by: noisyfox <timemanager.rick@gmail.com>

- use null conditional access in case some connections been
  cancelled unexpectedly and may cause null reference exception
- Refine error message
- use conditional operator to simplify some code

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

- display user-friendly server name
- clarify proxy type

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

# Conflicts:
#	shadowsocks-csharp/Controller/Service/TCPRelay.cs
#	shadowsocks-csharp/Controller/ShadowsocksController.cs
#	shadowsocks-csharp/View/MenuViewController.cs

I can't wait until PR #604 get merged, do it manually.

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Note:
- Added a configuration entry, user should add this
  by hand or reset from scratch.

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Replaced SocketFlags.None (an enum which euqals 0) from zero.

Correct AvailabilityStatistics's behavior under special strategies like "LoadBalance", which may switch the server several times in a short period.

# Conflicts:
#	README.md
#	shadowsocks-csharp/Controller/Service/AvailabilityStatistics.cs
#	shadowsocks-csharp/Controller/Service/PACServer.cs
#	shadowsocks-csharp/Controller/Strategy/SimplyChooseByStatisticsStrategy.cs
#	shadowsocks-csharp/Data/cn.txt
#	shadowsocks-csharp/Model/Configuration.cs
#	shadowsocks-csharp/Model/LogViewerConfig.cs
#	shadowsocks-csharp/View/LogForm.Designer.cs
#	shadowsocks-csharp/View/LogForm.cs
#	shadowsocks-csharp/View/MenuViewController.cs

follow with 5ae4df94e4

1. Add Logging.Info()
2. Console.WriteLine() -> Logging.Info()
3. Console.WriteLine() in exceptions -> Logging.LogUsefulException()

1/ removed dual empty line
2/ removed tailing spaces
3/ converted tabs into spaces
4/ added some TODO comments