New minimum uptime to become an HSDir is 96 hours.

changes/bug14149

@@ -0,0 +1,4 @@
+  o Minor features (hidden service parameters):
+    - Make hidden service Sybil attacks harder by changing the minimum
+      time required to become an HSDir from 25 hours up to 96 hours.
+      Addresses ticket #14149.

src/or/config.c

@@ -439,7 +439,7 @@ static config_var_t option_vars_[] = {
   VAR("__HashedControlSessionPassword", LINELIST, HashedControlSessionPassword,
       NULL),
   VAR("__OwningControllerProcess",STRING,OwningControllerProcess, NULL),
-  V(MinUptimeHidServDirectoryV2, INTERVAL, "25 hours"),
+  V(MinUptimeHidServDirectoryV2, INTERVAL, "96 hours"),
   V(VoteOnHidServDirectoriesV2,  BOOL,     "1"),
   V(TestingServerDownloadSchedule, CSV_INTERVAL, "0, 0, 0, 60, 60, 120, "
                                  "300, 900, 2147483647"),