Convert closesocket 'compat wrapper' to function in netbase

Simpler alternative to #4348.

The current setup with closesocket() is strange. It poses
as a compatibility wrapper but adds functionality.

Rename it and make it a documented utility function in netbase.

Code movement only, zero effect on the functionality.

1 files changed, 1 insertions, 2 deletions

diff --git a/src/net.h b/src/net.h
index 866c9ae783..f029a8d935 100644
--- a/src/net.h
+++ b/src/net.h
@@ -357,8 +357,7 @@ public:
     {
         if (hSocket != INVALID_SOCKET)
         {
-            closesocket(hSocket);
-            hSocket = INVALID_SOCKET;
+            CloseSocket(hSocket);
         }
         if (pfilter)
             delete pfilter;