Merge "Move some FileBackend related classes to /libs"

diff --cc autoload.php
index 198e477,998450c..1e98f63
--- 1/autoload.php
--- 2/autoload.php
+++ b/autoload.php
@@@ -1226,9 -1226,9 +1226,9 @@@ $wgAutoloadLocalClasses = 
        'SVGReader' => __DIR__ . '/includes/media/SVGMetadataExtractor.php',
        'SamplingStatsdClient' => __DIR__ . '/includes/libs/SamplingStatsdClient.php',
        'Sanitizer' => __DIR__ . '/includes/Sanitizer.php',
 -      'SavepointPostgres' => __DIR__ . '/includes/db/DatabasePostgres.php',
 +      'SavepointPostgres' => __DIR__ . '/includes/libs/rdbms/database/utils/SavepointPostgres.php',
        'ScopedCallback' => __DIR__ . '/includes/libs/ScopedCallback.php',
-       'ScopedLock' => __DIR__ . '/includes/filebackend/lockmanager/ScopedLock.php',
+       'ScopedLock' => __DIR__ . '/includes/libs/lockmanager/ScopedLock.php',
        'SearchApi' => __DIR__ . '/includes/api/SearchApi.php',
        'SearchDatabase' => __DIR__ . '/includes/search/SearchDatabase.php',
        'SearchDump' => __DIR__ . '/maintenance/dumpIterator.php',