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, 2 insertions, 3 deletions

diff --git a/src/or/circpathbias.c b/src/or/circpathbias.c
index 552947eba2..9f93e737f7 100644
--- a/src/or/circpathbias.c
+++ b/src/or/circpathbias.c
@@ -85,7 +85,6 @@ pathbias_get_notice_rate(const or_options_t *options)
                                    DFLT_PATH_BIAS_NOTICE_PCT, 0, 100)/100.0;
 }
 
-/* XXXX024 I'd like to have this be static again, but entrynodes.c needs it. */
 /** The circuit success rate below which we issue a warn */
 static double
 pathbias_get_warn_rate(const or_options_t *options)
@@ -98,7 +97,7 @@ pathbias_get_warn_rate(const or_options_t *options)
                                    DFLT_PATH_BIAS_WARN_PCT, 0, 100)/100.0;
 }
 
-/* XXXX024 I'd like to have this be static again, but entrynodes.c needs it. */
+/* XXXX I'd like to have this be static again, but entrynodes.c needs it. */
 /**
  * The extreme rate is the rate at which we would drop the guard,
  * if pb_dropguard is also set. Otherwise we just warn.
@@ -114,7 +113,7 @@ pathbias_get_extreme_rate(const or_options_t *options)
                                    DFLT_PATH_BIAS_EXTREME_PCT, 0, 100)/100.0;
 }
 
-/* XXXX024 I'd like to have this be static again, but entrynodes.c needs it. */
+/* XXXX I'd like to have this be static again, but entrynodes.c needs it. */
 /**
  * If 1, we actually disable use of guards that fall below
  * the extreme_pct.