Calculate percentage of blocked queries only of there is at least one blocked query to prevent division-by-zero issues (leading to None)

Signed-off-by: DL6ER <dl6er@dl6er.de>

src/api/stats_database.c

@@ -417,7 +417,11 @@ int api_stats_database_summary(struct ftl_conn *api)
 	           "WHERE timestamp >= :from AND timestamp <= :until";
 	const int total_clients = db_query_int_from_until(db, querystr, from, until);
 
-	const float percent_blocked = 1e2f*sum_blocked/sum_queries;
+	// Calculate percentage of blocked queries, substituting 0.0 if there
+	// are no blocked queries
+	float percent_blocked = 0.0;
+	if(sum_queries > 0.0)
+		percent_blocked = 1e2f*sum_blocked/sum_queries;
 
 	if(sum_queries < 0 || sum_blocked < 0 || total_clients < 0)
 	{

src/config/config.c

@@ -37,6 +37,9 @@ void set_all_debug(const bool status)
 		// Set status
 		conf_item->v.b = status;
 	}
+
+	// Update debug flags
+	set_debug_flags();
 }
 
 // Extract and store key from full path

src/config/legacy_reader.c

@@ -821,7 +821,7 @@ static void readDebugingSettingsLegacy(FILE *fp)
 	}
 
 	// Parse debug options
-	parse_debug_options();
+	set_debug_flags();
 
 	if(debug_any)
 	{

src/config/toml_reader.c

@@ -74,7 +74,7 @@ bool readFTLtoml(void)
 	}
 
 	// Report debug config if enabled
-	parse_debug_options();
+	set_debug_flags();
 	reportDebugConfig();
 
 	// Free memory allocated by the TOML parser and return success

src/log.c

@@ -30,7 +30,10 @@ static const char *process = "";
 bool debug_any = false;
 bool debug_flags[DEBUG_MAX] = { false };
 
-void parse_debug_options(void)
+// Set debug flags from config struct to global debug_flags array
+// This is called whenever the config is reloaded and debug flags may have
+// changed
+void set_debug_flags(void)
 {
 	// Reset debug flags
 	debug_any = false;

src/log.h

@@ -21,7 +21,7 @@
 extern bool debug_any;
 extern bool debug_flags[DEBUG_MAX];
 
-void parse_debug_options(void);
+void set_debug_flags(void);
 void init_FTL_log(const char *name);
 void log_counter_info(void);
 void format_memory_size(char prefix[2], unsigned long long int bytes,