Changed the default number of spare processes to 0.

src/nxt_conf_validation.c

@@ -565,7 +565,7 @@ nxt_conf_vldt_processes(nxt_conf_validation_t *vldt, nxt_conf_value_t *value,
         return ret;
     }
 
-    proc.spare = 1;
+    proc.spare = 0;
     proc.max = 1;
     proc.idle_timeout = 15;
 

src/nxt_router.c

@@ -1265,7 +1265,7 @@ nxt_router_conf_create(nxt_task_t *task, nxt_router_temp_conf_t *tmcf,
 
         apcf.processes = 1;
         apcf.max_processes = 1;
-        apcf.spare_processes = 1;
+        apcf.spare_processes = 0;
         apcf.timeout = 0;
         apcf.res_timeout = 1000;
         apcf.idle_timeout = 15000;