Always show MySQL variables, also if check is ok

This helps quickly inspecting settings, in my case for example
the MySQL transaction isolation level.
We should probably do this for all configuration settings.

Author: eldering

webapp/src/Service/CheckConfigService.php

@@ -219,37 +219,43 @@ public function checkMysqlSettings(): ConfigCheckItem
         $max_inout = max($max_inout, $output_limit);
 
         $result = 'O';
-        $desc = '';
+        $desc = sprintf("max_connections is set to %s.\n", $vars['max_connections']);
         if ($vars['max_connections'] < 300) {
             $result = 'W';
-            $desc .= sprintf("MySQL's max_connections is set to %s. In our experience you need at least 300, but better 1000 connections to prevent connection refusal during the contest.\n", $vars['max_connections']);
+            $desc .= sprintf("In our experience you need at least 300, but better 1000 connections to prevent connection refusal during the contest.\n");
         }
 
         if ($vars['innodb_log_file_size'] < 10 * $max_inout) {
             $result = 'W';
-            $desc .= sprintf("MySQL's innodb_log_file_size is set to %s. You may want to raise this to 10x the maximum of the test case size and output (storage) limit (now %s).\n", Utils::printsize((int)$vars['innodb_log_file_size']), Utils::printsize($max_inout));
+            $desc .= sprintf("innodb_log_file_size is set to %s. You may want to raise this to 10x the maximum of the test case size and output (storage) limit (now %s).\n", Utils::printsize((int)$vars['innodb_log_file_size']), Utils::printsize($max_inout));
+        } else {
+            $desc .= sprintf("innodb_log_file_size is set to %s. \n", Utils::printsize((int)$vars['innodb_log_file_size']));
         }
 
         $tx = ['REPEATABLE-READ', 'SERIALIZABLE'];
         if (!in_array($vars['tx_isolation'], $tx)) {
             $result = 'W';
-            $desc .= sprintf("MySQL's transaction isolation level is set to %s. You should set this to %s to prevent data inconsistencies.\n", $vars['tx_isolation'], implode(' or ', $tx));
+            $desc .= sprintf("transaction isolation level is set to %s. You should set this to %s to prevent data inconsistencies.\n", $vars['tx_isolation'], implode(' or ', $tx));
+        } else {
+            $desc .= sprintf("transaction isolation level is set to %s.\n", $vars['tx_isolation']);
         }
 
         $recommended_max_allowed_packet = 16*1024*1024;
         if ($vars['max_allowed_packet'] < 2*$max_inout) {
             $result = 'E';
-            $desc .= sprintf("MySQL's max_allowed_packet is set to %s. You may want to raise this to about twice the maximum of the test case size and output (storage) limit (currently %s).\n", Utils::printsize((int)$vars['max_allowed_packet']), Utils::printsize($max_inout));
+            $desc .= sprintf("max_allowed_packet is set to %s. You may want to raise this to about twice the maximum of the test case size and output (storage) limit (currently %s).\n", Utils::printsize((int)$vars['max_allowed_packet']), Utils::printsize($max_inout));
         } elseif ($vars['max_allowed_packet'] < $recommended_max_allowed_packet) {
             $result = 'W';
-            $desc .= sprintf("MySQL's max_allowed_packet is set to %s. We recommend at least 16MB.\n", Utils::printsize((int)$vars['max_allowed_packet']));
+            $desc .= sprintf("max_allowed_packet is set to %s. We recommend at least 16MB.\n", Utils::printsize((int)$vars['max_allowed_packet']));
+        } else {
+            $desc .= sprintf("max_allowed_packet is set to %s.\n", Utils::printsize((int)$vars['max_allowed_packet']));
         }
 
         $this->stopwatch->stop(__FUNCTION__);
         return new ConfigCheckItem(
             caption: 'MySQL settings',
             result: $result,
-            desc: $desc ?: 'MySQL settings are all ok'
+            desc: $desc
         );
     }