Move calls to thread_setname() into the thread start routines and move to a single argument thread_setname()

src/input.c

@@ -656,6 +656,8 @@ input(void *arg)
 {
   int ret;
 
+  thread_setname("input");
+
   ret = db_perthread_init();
   if (ret < 0)
     {
@@ -932,8 +934,6 @@ input_init(void)
       goto thread_fail;
     }
 
-  thread_setname(tid_input, "input");
-
   return 0;
 
  thread_fail: