Pass an empty value to -l to disabled logging

ChangeLog.md

@@ -3,6 +3,10 @@ Web change log
 
 ## ?.?.? / ????-??-??
 
+* Make passing an empty value for logging like such: `xp web -l "" [...]`
+  disable logging.
+  (@thekid)
+
 ## 4.4.2 / 2024-08-26
 
 * Fixed accessing params from a request with content-type, but without

src/main/php/web/logging/Sink.class.php

@@ -31,7 +31,7 @@ public function target() { return nameof($this); }
   public static function of($arg) {
     if ('-' === $arg) {
       return new ToConsole();
-    } else if (null === $arg) {
+    } else if (null === $arg || '' === $arg) {
       return null;
     } else if (is_callable($arg)) {
       return new ToFunction($arg);

src/test/php/web/unittest/LoggingTest.class.php

@@ -34,6 +34,11 @@ public function no_logging_target() {
     Assert::equals('(no logging)', (new Logging(null))->target());
   }
 
+  #[Test, Values([null, ''])]
+  public function no_logging_target_of($target) {
+    Assert::equals('(no logging)', Logging::of($target)->target());
+  }
+
   #[Test, Values(from: 'arguments')]
   public function log($expected, $error) {
     $req= new Request(new TestInput('GET', '/'));