conn_mgr.h: document in ll_queue style; config_parser/utun_instance updates

src/config_parser.h

@@ -62,6 +62,14 @@ struct CFG_CLIENT {
     struct CFG_CLIENT *next;              // Next client in linked list
 };
 
+struct CFG_NETWORK {
+    struct CFG_NETWORK* next;
+    char name[64];
+    uint64_t id;                                    // 56-bit network ID
+    char pubkey_hex[SC_PUBKEY_SIZE * 2 + 1];        // 64 hex chars
+    char signing_key_hex[SC_PRIVKEY_SIZE * 2 + 1];  // 64 hex chars
+};
+
 struct CFG_ROUTE_ENTRY {
     struct CFG_ROUTE_ENTRY* next;
     struct IP ip;
@@ -180,6 +188,7 @@ struct utun_config {
     struct CFG_CLIENT* clients;
     struct CFG_ROUTE_ENTRY* route_subnets;
     struct CFG_ROUTE_ENTRY* my_subnets;
+    struct CFG_NETWORK* networks;
 };
 
 struct utun_config* parse_config(const char *filename);