Correctly handle keepalive option

[vaxvms]

mod-livestatus doesn't close the connection when keepalive isn't set.

It break clients who wait for server to close the connection after sending data such as https://github.com/sni/lmd as describe in sni/lmd#24

[olivierHa]

Hello,

J'ai l'impression que tu coupes le Keepalive pour toutes les requetes sauf celles de type "wait".

Je me trompe ?

[vaxvms]

Non, je conserve le keepalive pour les requetes qui le demande explicitement.

le keepalive etait parfois un boolean, parfois une chaine. J'ai tout mis en chaine

13:40 $ telnet localhost 50000
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
GET status
KeepAlive: on

accept_passive_host_checks;accept_passive_service_checks;cached_log_messages;cached_log_messages_rate;check_external_commands;check_host_freshness;check_service_freshness;connections;connections_rate;enable_event_handlers;enable_flap_detection;enable_notifications;execute_host_checks;execute_service_checks;external_command_buffer_max;external_command_buffer_slots;external_command_buffer_usage;external_commands_rate;forks;forks_rate;host_checks;host_checks_rate;interval_length;last_command_check;last_log_rotation;livestatus_version;log_messages;log_messages_rate;nagios_pid;neb_callbacks;neb_callbacks_rate;obsess_over_hosts;obsess_over_services;process_performance_data;program_start;program_version;requests;requests_rate;service_checks;service_checks_rate
1;1;0;0;1;1;1;0;0;1;1;1;1;1;0;0;0;0;0;0;0;0;60;1526643647;1526643647;2.0-shinken;0;0;54841;0;0;0;0;1;1526455533;2.4.3;0;0;0;0
GET status

accept_passive_host_checks;accept_passive_service_checks;cached_log_messages;cached_log_messages_rate;check_external_commands;check_host_freshness;check_service_freshness;connections;connections_rate;enable_event_handlers;enable_flap_detection;enable_notifications;execute_host_checks;execute_service_checks;external_command_buffer_max;external_command_buffer_slots;external_command_buffer_usage;external_commands_rate;forks;forks_rate;host_checks;host_checks_rate;interval_length;last_command_check;last_log_rotation;livestatus_version;log_messages;log_messages_rate;nagios_pid;neb_callbacks;neb_callbacks_rate;obsess_over_hosts;obsess_over_services;process_performance_data;program_start;program_version;requests;requests_rate;service_checks;service_checks_rate
1;1;0;0;1;1;1;0;0;1;1;1;1;1;0;0;0;0;0;0;0;0;60;1526643647;1526643647;2.0-shinken;0;0;54841;0;0;0;0;1;1526455533;2.4.3;0;0;0;0
Connection closed by foreign host.