Error closing socket input stream. Version: 2.7.1

I continue getting the following error in android
```
E/HttpProxyCacheServer: HttpProxyCacheServer error
com.danikula.videocache.ProxyCacheException: Error closing socket input stream. Version: 2.7.1
at com.danikula.videocache.HttpProxyCacheServer.closeSocketInput(HttpProxyCacheServer.java:287)
at com.danikula.videocache.HttpProxyCacheServer.releaseSocket(HttpProxyCacheServer.java:272)
at com.danikula.videocache.HttpProxyCacheServer.processSocket(HttpProxyCacheServer.java:245)
at com.danikula.videocache.HttpProxyCacheServer.access$200(HttpProxyCacheServer.java:54)
at com.danikula.videocache.HttpProxyCacheServer$SocketProcessorRunnable.run(HttpProxyCacheServer.java:340)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:458)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:764)
Caused by: java.io.IOException: shutdown failed: ENOTCONN (Transport endpoint is not connected)
at java.net.PlainSocketImpl.socketShutdown(PlainSocketImpl.java:275)
at java.net.AbstractPlainSocketImpl.shutdownInput(AbstractPlainSocketImpl.java:619)
at java.net.Socket.shutdownInput(Socket.java:1570)
at com.danikula.videocache.HttpProxyCacheServer.closeSocketInput(HttpProxyCacheServer.java:280)
at com.danikula.videocache.HttpProxyCacheServer.releaseSocket(HttpProxyCacheServer.java:272) 
at com.danikula.videocache.HttpProxyCacheServer.processSocket(HttpProxyCacheServer.java:245) 
at com.danikula.videocache.HttpProxyCacheServer.access$200(HttpProxyCacheServer.java:54) 
at com.danikula.videocache.HttpProxyCacheServer$SocketProcessorRunnable.run(HttpProxyCacheServer.java:340) 
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:458) 
at java.util.concurrent.FutureTask.run(FutureTask.java:266) 
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) 
at java.lang.Thread.run(Thread.java:764) 
Caused by: android.system.ErrnoException: shutdown failed: ENOTCONN (Transport endpoint is not connected)
at libcore.io.Linux.shutdown(Native Method)
at libcore.io.ForwardingOs.shutdown(ForwardingOs.java:177)
at java.net.PlainSocketImpl.socketShutdown(PlainSocketImpl.java:273)
at java.net.AbstractPlainSocketImpl.shutdownInput(AbstractPlainSocketImpl.java:619) 
at java.net.Socket.shutdownInput(Socket.java:1570) 
at com.danikula.videocache.HttpProxyCacheServer.closeSocketInput(HttpProxyCacheServer.java:280) 
at com.danikula.videocache.HttpProxyCacheServer.releaseSocket(HttpProxyCacheServer.java:272) 
at com.danikula.videocache.HttpProxyCacheServer.processSocket(HttpProxyCacheServer.java:245) 
at com.danikula.videocache.HttpProxyCacheServer.access$200(HttpProxyCacheServer.java:54) 
at com.danikula.videocache.HttpProxyCacheServer$SocketProcessorRunnable.run(HttpProxyCacheServer.java:340) 
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:458) 
at java.util.concurrent.FutureTask.run(FutureTask.java:266) 
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) 
at java.lang.Thread.run(Thread.java:764) 
```

Start in HttpProxyCacheServer.java at closeSocketInput (line 280), releaseSocket (line 272), and processSocket (line 245), using the reported stack trace as the entry point. Reproduce the Android 2.7.1 socket shutdown path and determine the expected behavior when shutdown reports ENOTCONN; done means the behavior is handled consistently without the reported error.

Written by the indexing model from the issue text.