turn off startup debug logging introduced by previous commit

src/core/ngx_cycle.c

diff --git a/src/core/ngx_cycle.c b/src/core/ngx_cycle.c
index 4b3b240..baf25ea 100644
--- a/src/core/ngx_cycle.c
+++ b/src/core/ngx_cycle.c
@@ -205,7 +205,7 @@
     conf.module_type = NGX_CORE_MODULE;
     conf.cmd_type = NGX_MAIN_CONF;
 
-#if 1
+#if 0
     log->log_level = NGX_LOG_DEBUG_ALL;
 #endif