Initial config file infrastructure

Also unify command line option structure/parsing so everything's
in the same order in the code.

config.h

@@ -18,6 +18,17 @@ typedef struct
 
 }	t_configuration_options;
 
+/*
+ * The following will initialize the structure with a minimal set of options;
+ * actual defaults are set in parse_config() before parsing the configuration file
+ */
+
+#define T_CONFIGURATION_OPTIONS_INITIALIZER { \
+		/* node settings */ \
+		UNKNOWN_NODE_ID, "", \
+		/* log settings */ \
+        "", "", ""}
+
 typedef struct ItemListCell
 {
 	struct ItemListCell *next;
@@ -34,8 +45,10 @@ typedef struct ItemList
 void		set_progname(const char *argv0);
 const char *progname(void);
 
+bool		load_config(const char *config_file, bool verbose, t_configuration_options *options, char *argv0);
+bool		parse_config(t_configuration_options *options);
+bool		reload_config(t_configuration_options *orig_options);
+
 void		item_list_append(ItemList *item_list, char *error_message);
 
-
-
 #endif