Moved the server start time to the init_thread request and got rid of
the init_process request (based on a patch by Felix Nawothnig).

diff --git a/server/thread.c b/server/thread.c
index f1f4f27..93c08ce 100644
--- a/server/thread.c
+++ b/server/thread.c
@@ -888,6 +888,7 @@
     reply->pid     = get_process_id( process );
     reply->tid     = get_thread_id( current );
     reply->version = SERVER_PROTOCOL_VERSION;
+    reply->server_start = server_start_time;
     return;
 
  error: