bug #35774 [Ldap] force default network timeout (nicolas-grekas)

This PR was merged into the 3.4 branch.

Discussion
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[Ldap] force default network timeout

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       | -
| License       | MIT
| Doc PR        | -

The default network timeout is infinite, which makes no sense and can block workers.

Note that LDAP supports also "timelimit" options, but those are max-durations for LDAP queries. We cannot limit them by default.

Commits
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63f9e01 [Ldap] force default network timeout

src/Symfony/Component/Ldap/Adapter/ExtLdap/Connection.php

@@ -107,6 +107,10 @@ protected function configureOptions(OptionsResolver $resolver)
                 $value['referrals'] = $options['referrals'];
             }
 
+            if (!isset($value['network_timeout'])) {
+                $value['network_timeout'] = ini_get('default_socket_timeout');
+            }
+
             return $value;
         });