Downgrade log messages about cbt enabled/disabled. Bug 6169.

changes/bug6169

@@ -0,0 +1,4 @@
+  o Minor bugfixes:
+    - Remove a non-bug log messages about running with circuit timeout
+      learning enabled from LD_BUG. Fixes bug 6169; bugfix on
+      0.2.3.17-beta.

src/or/circuitbuild.c

@@ -158,14 +158,14 @@ circuit_build_times_disabled(void)
 
     if (consensus_disabled || config_disabled || dirauth_disabled ||
            state_disabled) {
-      log_info(LD_CIRC,
+      log_debug(LD_CIRC,
                "CircuitBuildTime learning is disabled. "
                "Consensus=%d, Config=%d, AuthDir=%d, StateFile=%d",
                consensus_disabled, config_disabled, dirauth_disabled,
                state_disabled);
       return 1;
     } else {
-      log_debug(LD_BUG,
+      log_debug(LD_CIRC,
                 "CircuitBuildTime learning is not disabled. "
                 "Consensus=%d, Config=%d, AuthDir=%d, StateFile=%d",
                 consensus_disabled, config_disabled, dirauth_disabled,