Fix high CPU usage when running the SDK server

It was coming from `recv_select()` and `accept_select()`
The timeval struct members for select() is reset after each call to select() for
whatever reason so like FD_ZERO and FD_SET it needs to be placed inside
the loop.

Source: https://stackoverflow.com/questions/3324078/why-select-always-return-0-after-the-first-timeout

NetworkClient.cpp

@@ -230,11 +230,12 @@ int NetworkClient::recv_select(SOCKET s, char *buf, int len, int flags)
 {
     fd_set              set;
     struct timeval      timeout;
-    timeout.tv_sec      = 5;
-    timeout.tv_usec     = 0;
 
     while(1)
     {
+        timeout.tv_sec      = 5;
+        timeout.tv_usec     = 0;
+        
         FD_ZERO(&set);      /* clear the set */
         FD_SET(s, &set);    /* add our file descriptor to the set */
 

NetworkServer.cpp

@@ -267,13 +267,14 @@ int NetworkServer::accept_select(int sockfd, struct sockaddr *addr, socklen_t *a
 {
     fd_set              set;
     struct timeval      timeout;
-    timeout.tv_sec      = 5;
-    timeout.tv_usec     = 0;
 
     while(1)
     {
-        FD_ZERO(&set);      /* clear the set */
-        FD_SET(sockfd, &set);    /* add our file descriptor to the set */
+        timeout.tv_sec          = 5;
+        timeout.tv_usec         = 0;
+
+        FD_ZERO(&set);          /* clear the set */
+        FD_SET(sockfd, &set);   /* add our file descriptor to the set */
 
         int rv = select(sockfd + 1, &set, NULL, NULL, &timeout);
 
@@ -298,11 +299,12 @@ int NetworkServer::recv_select(SOCKET s, char *buf, int len, int flags)
 {
     fd_set              set;
     struct timeval      timeout;
-    timeout.tv_sec      = 5;
-    timeout.tv_usec     = 0;
 
     while(1)
     {
+        timeout.tv_sec      = 5;
+        timeout.tv_usec     = 0;
+
         FD_ZERO(&set);      /* clear the set */
         FD_SET(s, &set);    /* add our file descriptor to the set */