Use SENTRY_SPOTLIGHT as default value for Spotlight options

src/Options.php

@@ -371,7 +371,10 @@ public function isSpotlightEnabled(): bool
         return \is_string($this->options['spotlight']) || $this->options['spotlight'];
     }
 
-    public function enableSpotlight(bool $enable): self
+    /**
+     * @param bool|string $enable can be passed a boolean or the Spotlight URL (which will also enable Spotlight)
+     */
+    public function enableSpotlight($enable): self
     {
         $options = array_merge($this->options, ['spotlight' => $enable]);
 
@@ -389,6 +392,11 @@ public function getSpotlightUrl(): string
         return $this->options['spotlight_url'];
     }
 
+    /**
+     * @return $this
+     *
+     * @deprecated Use `enableSpotlight` instead. Will be removed in 5.x.
+     */
     public function setSpotlightUrl(string $url): self
     {
         $options = array_merge($this->options, ['spotlight_url' => $url]);
@@ -1132,6 +1140,9 @@ private function configureOptions(OptionsResolver $resolver): void
             'environment' => $_SERVER['SENTRY_ENVIRONMENT'] ?? null,
             'logger' => null,
             'spotlight' => $_SERVER['SENTRY_SPOTLIGHT'] ?? null,
+            /**
+             * @deprecated Use `spotlight` instead. Will be removed in 5.x.
+             */
             'spotlight_url' => 'http://localhost:8969',
             'release' => $_SERVER['SENTRY_RELEASE'] ?? $_SERVER['AWS_LAMBDA_FUNCTION_VERSION'] ?? null,
             'dsn' => $_SERVER['SENTRY_DSN'] ?? null,
@@ -1269,7 +1280,7 @@ private function normalizeBooleanOrUrl(SymfonyOptions $options, ?string $boolean
             return false;
         }
 
-        if (str_starts_with($booleanOrUrl, 'http')) {
+        if (filter_var($booleanOrUrl, \FILTER_VALIDATE_URL)) {
             return $booleanOrUrl;
         }