Filesystem API: Expicitly set directory permissions in `WP_Filesystem_SSH2::mkdir()`.

This ensures the permissions are correct after a directory is created with `ssh2_sftp_mkdir()`, which appears to be affected by system `umask` settings.

Props bbrdaric.
Fixes #49218.
Built from https://develop.svn.wordpress.org/trunk@48090


git-svn-id: http://core.svn.wordpress.org/trunk@47857 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/class-wp-filesystem-ssh2.php

@@ -695,6 +695,9 @@ class WP_Filesystem_SSH2 extends WP_Filesystem_Base {
 			return false;
 		}
 
+		// Set directory permissions.
+		ssh2_sftp_chmod( $this->sftp_link, $path, $chmod );
+
 		if ( $chown ) {
 			$this->chown( $path, $chown );
 		}

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-alpha-48089';
+$wp_version = '5.5-alpha-48090';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.