add custom client disconnect timeout option, close #485

conf/npc.conf

@@ -13,6 +13,7 @@ web_password=1234
 crypt=true
 compress=true
 #pprof_addr=0.0.0.0:9999
+disconnect_timeout=60
 
 [health_check_test1]
 health_check_timeout=1

conf/nps.conf

@@ -80,3 +80,6 @@ http_add_origin_header=false
 #pprof debug options
 #pprof_ip=0.0.0.0
 #pprof_port=9999
+
+#client disconnect timeout
+disconnect_timeout=60