server_connect_retries does not work correctly

[RomanBelozerov]

Tempesta - cf66914

Config:

srv_group default {
    server SERVER_IP:8000 conns_n=1;
    server_connect_retries 3;
}

1. start TempestaFW and DeproxyServer on 8000 port;
2. stop DeproxyServer;

ER: TempestaFW make 4 tries and warning in dmesg - cannot establish connection for SERVER_IP:8000: 4 tries;
AR: TempestaFW repeats the tries infinitely and warning in dmesg - cannot establish connection for SERVER_IP:8000: 6 tries, keep trying... But I set server_connect_retries 3 and default value is 10.

Testing

reconf.test_reconf_base.TestServerOptionsReconf.test_reconf_server_connect_retries_with_conns_n_1
reconf.test_reconf_base.TestServerOptionsReconf.test_reconf_server_connect_retries_with_conns_n_3
reconf.test_reconf_base.TestServerOptionsReconf.test_reconf_server_connect_retries_from_default
reconf.test_reconf_base.TestServerOptionsReconf.test_reconf_server_connect_retries_from_0