Update socket.cpp

Author: romanholidaypancakes

clickhouse/base/socket.cpp

@@ -181,7 +181,8 @@ NetworkAddress::NetworkAddress(const std::string& host, const std::string& port)
 
     hints.ai_family = PF_UNSPEC;
     hints.ai_socktype = SOCK_STREAM;
-
+    // using AI_ADDRCONFIG on windows will cause getaddrinfo to return WSAHOST_NOT_FOUND
+    // for more information, see https://github.com/ClickHouse/clickhouse-cpp/issues/195
 #if defined(_unix_) 
     if (!Singleton<LocalNames>()->IsLocalName(host)) {
         // https://linux.die.net/man/3/getaddrinfo