1 files changed, 14 insertions, 0 deletions
diff --git a/src/or/or.h b/src/or/or.h
index 185d20d429..25e4e0f98c 100644
--- a/src/or/or.h
+++ b/src/or/or.h
@@ -2838,11 +2838,25 @@ typedef struct port_cfg_t {
   char unix_addr[FLEXIBLE_ARRAY_MEMBER];
 } port_cfg_t;
 
+/** Ordinary configuration line. */
+#define CONFIG_LINE_NORMAL 0
+/** Appends to previous configuration for the same option, even if we
+ * would ordinary replace it. */
+#define CONFIG_LINE_APPEND 1
+/* Removes all previous configuration for an option. */
+#define CONFIG_LINE_CLEAR 2
+
 /** A linked list of lines in a config file. */
 typedef struct config_line_t {
   char *key;
   char *value;
   struct config_line_t *next;
+  /** What special treatment (if any) does this line require? */
+  unsigned int command:2;
+  /** If true, subsequent assignments to this linelist should replace
+   * it, not extend it.  Set only on the first item in a linelist in an
+   * or_options_t. */
+  unsigned int fragile:1;
 } config_line_t;
 
 typedef struct routerset_t routerset_t;