Add bruteforce protection to the shareinfo endpoint

[rullzer]

Signed-off-by: Roeland Jago Douma roeland@famdouma.nl

[rullzer]

/backport to stable21

[rullzer]

/backport to stable20

[rullzer]

/backport to stable19

[juliusknorr]

Tests need adjustments:

There were 3 failures:

1) OCA\Files_Sharing\Tests\Controller\ShareInfoControllerTest::testNoShare
Failed asserting that two objects are equal.
--- Expected
+++ Actual
@@ @@
     'ETag' => null
     'contentSecurityPolicy' => null
     'featurePolicy' => null
-    'throttled' => false
+    'throttled' => true
     'throttleMetadata' => Array (
+        'token' => 'token'
     )
 )

/drone/src/apps/files_sharing/tests/Controller/ShareInfoControllerTest.php:69

2) OCA\Files_Sharing\Tests\Controller\ShareInfoControllerTest::testWrongPassword
Failed asserting that two objects are equal.
--- Expected
+++ Actual
@@ @@
     'ETag' => null
     'contentSecurityPolicy' => null
     'featurePolicy' => null
-    'throttled' => false
+    'throttled' => true
     'throttleMetadata' => Array (
+        'token' => 'token'
     )
 )

/drone/src/apps/files_sharing/tests/Controller/ShareInfoControllerTest.php:85

3) OCA\Files_Sharing\Tests\Controller\ShareInfoControllerTest::testNoReadPermissions
Failed asserting that two objects are equal.
--- Expected
+++ Actual
@@ @@
     'ETag' => null
     'contentSecurityPolicy' => null
     'featurePolicy' => null
-    'throttled' => false
+    'throttled' => true
     'throttleMetadata' => Array (
+        'token' => 'token'
     )
 )

/drone/src/apps/files_sharing/tests/Controller/ShareInfoControllerTest.php:103