Replace nearly all XXX0vv comments with smarter ones

So, back long ago, XXX012 meant, "before Tor 0.1.2 is released, we
had better revisit this comment and fix it!"

But we have a huge pile of such comments accumulated for a large
number of released versions!  Not cool.

So, here's what I tried to do:

  * 0.2.9 and 0.2.8 are retained, since those are not yet released.

  * XXX+ or XXX++ or XXX++++ or whatever means, "This one looks
    quite important!"

  * The others, after one-by-one examination, are downgraded to
    plain old XXX.  Which doesn't mean they aren't a problem -- just
    that they cannot possibly be a release-blocking problem.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/or/dirserv.c b/src/or/dirserv.c
index e61f56e0aa..ad476c582a 100644
--- a/src/or/dirserv.c
+++ b/src/or/dirserv.c
@@ -823,7 +823,7 @@ running_long_enough_to_decide_unreachable(void)
 void
 dirserv_set_router_is_running(routerinfo_t *router, time_t now)
 {
-  /*XXXX024 This function is a mess.  Separate out the part that calculates
+  /*XXXX This function is a mess.  Separate out the part that calculates
     whether it's reachable and the part that tells rephist that the router was
     unreachable.
    */
@@ -1241,7 +1241,7 @@ dirserv_thinks_router_is_unreliable(time_t now,
 {
   if (need_uptime) {
     if (!enough_mtbf_info) {
-      /* XXX024 Once most authorities are on v3, we should change the rule from
+      /* XXXX We should change the rule from
        * "use uptime if we don't have mtbf data" to "don't advertise Stable on
        * v3 if we don't have enough mtbf data."  Or maybe not, since if we ever
        * hit a point where we need to reset a lot of authorities at once,
@@ -3252,7 +3252,7 @@ lookup_cached_dir_by_fp(const char *fp)
     d = strmap_get(cached_consensuses, "ns");
   } else if (memchr(fp, '\0', DIGEST_LEN) && cached_consensuses &&
            (d = strmap_get(cached_consensuses, fp))) {
-    /* this here interface is a nasty hack XXXX024 */;
+    /* this here interface is a nasty hack XXXX */;
   }
   return d;
 }