Avoid logging graceful disconnect as error

The chromecasts restart each night, and seem to
generally do this by doing a socket shutdown of
write leading to a EOF received by clients.

No need to log this as an error

pychromecast/error.py

@@ -11,6 +11,10 @@ class ChromecastConnectionError(PyChromecastError):
     """When a connection error occurs within PyChromecast."""
 
 
+class ChromecastConnectionClosed(PyChromecastError):
+    """When a connection was closed by remote device."""
+
+
 class PyChromecastStopped(PyChromecastError):
     """Raised when a command is invoked while the Chromecast's socket_client
     is stopped.

pychromecast/socket_client.py

@@ -33,6 +33,7 @@
 from .dial import get_host_from_service
 from .error import (
     ChromecastConnectionError,
+    ChromecastConnectionClosed,
     ControllerNotRegistered,
     NotConnected,
     PyChromecastStopped,
@@ -619,6 +620,15 @@ def _run_once(self) -> int:
                     if self.stop.is_set():
                         return 1
                 raise
+            except ChromecastConnectionClosed as exc:
+                self._force_recon = True
+                self.logger.debug(
+                    "[%s(%s):%s] %s",
+                    self.fn or "",
+                    self.host,
+                    self.port,
+                    exc,
+                )
             except socket.error as exc:
                 self._force_recon = True
                 self.logger.error(
@@ -817,7 +827,7 @@ def _read_bytes_from_socket(self, msglen: int) -> bytes:
             try:
                 chunk = self.socket.recv(min(msglen - bytes_recd, 2048))
                 if chunk == b"":
-                    raise socket.error("socket connection broken")
+                    raise ChromecastConnectionClosed("Connection was closed by remote")
                 chunks.append(chunk)
                 bytes_recd += len(chunk)
             except TimeoutError: