Per suggestion, increase the retry frequency for primary guards.

src/or/entrynodes.c

@@ -1708,8 +1708,8 @@ get_retry_schedule(time_t failing_since, time_t now,
   const struct {
     time_t maximum; int primary_delay; int nonprimary_delay;
   } delays[] = {
-    { SIX_HOURS,    30*60,  1*60*60 },
-    { FOUR_DAYS,  2*60*60,  4*60*60 },
+    { SIX_HOURS,    10*60,  1*60*60 },
+    { FOUR_DAYS,    90*60,  4*60*60 },
     { SEVEN_DAYS, 4*60*60, 18*60*60 },
     { TIME_MAX,   9*60*60, 36*60*60 }
   };