Fix automatic logout from YunoHost when logging out from Nextcloud (#106):

- fix Nextcloud source patch
- fix patches not applied on installation
- add an empty patches directory to work around a nasty cache issue when running package_check

scripts/upgrade

@@ -176,8 +176,6 @@ do
     # then it's the last upgrade to do
     if [ "$major_version" -eq "$current_major_version" ]; then
       current_major_version=last
-	# Patch nexcloud files only for the last upgrade.
-	cp -a ../sources/patches_last_version ../sources/patches
     fi
 
     # Load the value for this version

scripts/upgrade.d/upgrade.last.sh

@@ -5,3 +5,6 @@ next_version="13.0.1"
 
 # Nextcloud tarball checksum sha256
 nextcloud_source_sha256="5743314a71e972ae46a14b36b37394d4545915aa5f32d9e12ba786d04c1f1d11"
+
+# Patch nextcloud files only for the last version
+cp -a ../sources/patches_last_version/* ../sources/patches

sources/patches_last_version/app-00-add-logout_url-conf.patch

@@ -1,14 +1,14 @@
 --- a/core/Controller/LoginController.php
 +++ b/core/Controller/LoginController.php
-@@ -100,7 +100,10 @@ class LoginController extends Controller {
+@@ -119,7 +119,10 @@
  		}
  		$this->userSession->logout();
 
--		return new RedirectResponse($this->urlGenerator->linkToRouteAbsolute('core.login.showLoginForm'));
+-		$response = new RedirectResponse($this->urlGenerator->linkToRouteAbsolute('core.login.showLoginForm'));
 +		$redirectUrl = $this->config->getSystemValue('logout_url',
 +			$this->urlGenerator->linkToRouteAbsolute('core.login.showLoginForm')
 +		);
-+		return new RedirectResponse($redirectUrl);
++		$response = new RedirectResponse($redirectUrl);
+ 		$response->addHeader('Clear-Site-Data', '"cache", "cookies", "storage", "executionContexts"');
+ 		return $response;
  	}
- 
- 	/**