Initial implementation of an iterable configuration item list

This implements storing the configuration file parameter definitions in
an iterable list. This will replace the existing way of populating the
configuration struct, which is a long and cumbersome if/else structure,
and will make it possible to later dump the imported configuration.

repmgr-client.c

@@ -76,6 +76,7 @@
 
 t_runtime_options runtime_options = T_RUNTIME_OPTIONS_INITIALIZER;
 
+
 /* conninfo params for the node we're operating on */
 t_conninfo_param_list source_conninfo = T_CONNINFO_PARAM_LIST_INITIALIZER;
 
@@ -1073,12 +1074,11 @@ main(int argc, char **argv)
 	 * clone'), however if available we'll parse it anyway for options like
 	 * 'log_level', 'use_replication_slots' etc.
 	 */
-	load_config(runtime_options.config_file,
-				runtime_options.verbose,
-				runtime_options.terse,
-				&config_file_options,
-				argv[0]);
-
+	load_config2(runtime_options.config_file,
+				 runtime_options.verbose,
+				 runtime_options.terse,
+				 argv[0]);
+	exit(0);
 	check_cli_parameters(action);
 
 	/*