log more changes made by chronyc commands

Log important changes from chronyc for auditing purposes.

Add log messages for:
- loaded symmetric keys and server NTS keys (logged also on start)
- modified maxupdateskew and makestep
- enabled/disabled local reference mode (logged also on start)
- reset time smoothing (logged also on clock steps)
- reset sources

keys.c

@@ -255,6 +255,8 @@ KEY_Reload(void)
      more careful! */
   qsort(ARR_GetElements(keys), ARR_GetSize(keys), sizeof (Key), compare_keys_by_id);
 
+  LOG(LOGS_INFO, "Loaded %u symmetric keys", ARR_GetSize(keys));
+
   /* Check for duplicates */
   for (i = 1; i < ARR_GetSize(keys); i++) {
     if (get_key(i - 1)->id == get_key(i)->id)

nts_ke_server.c

@@ -575,7 +575,7 @@ save_keys(void)
   return;
 
 error:
-  LOG(LOGS_ERR, "Could not %s server NTS keys", "save");
+  LOG(LOGS_ERR, "Could not %s %s", "save", "server NTS keys");
   fclose(f);
 
   if (!UTI_RemoveFile(dump_dir, DUMP_FILENAME, NULL))
@@ -649,10 +649,11 @@ load_keys(void)
 
   fclose(f);
 
+  LOG(LOGS_ERR, "Loaded %s", "server NTS keys");
   return 1;
 
 error:
-  LOG(LOGS_ERR, "Could not %s server NTS keys", "load");
+  LOG(LOGS_ERR, "Could not %s %s", "load", "server NTS keys");
   fclose(f);
 
   return 0;

reference.c

@@ -1329,6 +1329,7 @@ void
 REF_ModifyMaxupdateskew(double new_max_update_skew)
 {
   max_update_skew = new_max_update_skew * 1.0e-6;
+  LOG(LOGS_INFO, "New maxupdateskew %f ppm", new_max_update_skew);
 }
 
 /* ================================================== */
@@ -1338,6 +1339,7 @@ REF_ModifyMakestep(int limit, double threshold)
 {
   make_step_limit = limit;
   make_step_threshold = threshold;
+  LOG(LOGS_INFO, "New makestep %f %d", threshold, limit);
 }
 
 /* ================================================== */
@@ -1349,6 +1351,7 @@ REF_EnableLocal(int stratum, double distance, int orphan)
   local_stratum = CLAMP(1, stratum, NTP_MAX_STRATUM - 1);
   local_distance = distance;
   local_orphan = !!orphan;
+  LOG(LOGS_INFO, "%s local reference mode", "Enabled");
 }
 
 /* ================================================== */
@@ -1357,6 +1360,7 @@ void
 REF_DisableLocal(void)
 {
   enable_local_stratum = 0;
+  LOG(LOGS_INFO, "%s local reference mode", "Disabled");
 }
 
 /* ================================================== */

smooth.c

@@ -302,7 +302,7 @@ SMT_Activate(struct timespec *now)
   if (!enabled || !locked)
     return;
 
-  LOG(LOGS_INFO, "Time smoothing activated%s", leap_only_mode ?
+  LOG(LOGS_INFO, "Activated %s%s", "time smoothing", leap_only_mode ?
       " (leap seconds only)" : "");
   locked = 0;
   last_update = *now;
@@ -322,6 +322,8 @@ SMT_Reset(struct timespec *now)
 
   for (i = 0; i < NUM_STAGES; i++)
     stages[i].wander = stages[i].length = 0.0;
+
+  LOG(LOGS_INFO, "Reset %s", "time smoothing");
 }
 
 void

sources.c

@@ -1546,6 +1546,8 @@ SRC_ResetSources(void)
 
   for (i = 0; i < n_sources; i++)
     SRC_ResetInstance(sources[i]);
+
+  LOG(LOGS_INFO, "Reset all sources");
 }
 
 /* ================================================== */