fix a copy-paste comment mistake

src/or/dirvote.h

@@ -61,8 +61,8 @@
  * Unmeasured=1 flag for unmeasured bandwidths */
 #define MIN_METHOD_TO_CLIP_UNMEASURED_BW 17
 
-/** Lowest consensus method that ensures that authorities output an
- * Unmeasured=1 flag for unmeasured bandwidths */
+/** Lowest consensus method where authorities may include an "id" line in
+ * microdescriptors. */
 #define MIN_METHOD_FOR_ID_HASH_IN_MD 18
 
 /** Default bandwidth to clip unmeasured bandwidths to using method >=