Restore support for WordPress 5.3.0 and 5.3.1

.github/workflows/image.yml

@@ -21,4 +21,4 @@ jobs:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
       - name: Build image
-        run: build/bin/build "5.3.2 5.4.0 5.4.1 5.4.2 5.5.1 5.5.3 5.6.0 5.6.1 5.7.0 5.7.1 5.7.2 5.8.0" "5.8.0"
+        run: build/bin/build "5.3.0 5.3.1 5.3.2 5.4.0 5.4.1 5.4.2 5.5.1 5.5.3 5.6.0 5.6.1 5.7.0 5.7.1 5.7.2 5.8.0" "5.8.0"

patches/5.3.0/wp-admin-update-core.patch

@@ -0,0 +1,14 @@
+--- update-core.php	2021-09-23 17:11:30.239616145 +0200
++++ update-core.php	2021-09-23 17:11:47.723078888 +0200
+@@ -797,6 +797,11 @@
+ 		wp_die( __( 'Sorry, you are not allowed to update this site.' ) );
+ 	}
+ 
++	wp_die(
++		__( 'Sorry, you are not allowed to update this site.' ) .
++		' Click <a href="https://github.com/N0rthernL1ghts/wordpress/wiki/WordPress-Core-Updates">here</a> to learn why.'
++	);	
++
+ 	check_admin_referer( 'upgrade-core' );
+ 
+ 	// Do the (un)dismiss actions before headers, so that they can redirect.

patches/5.3.1/wp-admin-update-core.patch

@@ -0,0 +1,14 @@
+--- update-core.php	2021-09-23 17:09:32.192073263 +0200
++++ update-core.php	2021-09-23 17:10:26.225808222 +0200
+@@ -797,6 +797,11 @@
+ 		wp_die( __( 'Sorry, you are not allowed to update this site.' ) );
+ 	}
+ 
++	wp_die(
++		__( 'Sorry, you are not allowed to update this site.' ) .
++		' Click <a href="https://github.com/N0rthernL1ghts/wordpress/wiki/WordPress-Core-Updates">here</a> to learn why.'
++	);
++
+ 	check_admin_referer( 'upgrade-core' );
+ 
+ 	// Do the (un)dismiss actions before headers, so that they can redirect.