Improved quality of docblock comments

src/Signal/SignalTrap.php

@@ -9,17 +9,33 @@ class SignalTrap
 
     protected $trapped = false;
 
+    /**
+     * Constructor
+     *
+     * @param integer $signo
+     */
     public function __construct(int $signo)
     {
         $this->signal = new Signal($signo);
         $this->signal->setHandler([ $this, "onSignal" ]);
     }
 
+    /**
+     * Signal handler callback
+     *
+     * @return void
+     */
     public function onSignal()
     {
         $this->trapped = true;
     }
 
+    /**
+     * Check if the signal has been received
+     *
+     * @param boolean $reset
+     * @return boolean
+     */
     public function isTrapped($reset=true):bool
     {
         if ($this->trapped) {