Formatting: normalise back to 4-space indentation.

In several pieces of development recently I've run across the
occasional code block in the middle of a function which suddenly
switched to 2-space indent from this code base's usual 4. I decided I
was tired of it, so I ran the whole code base through a re-indenter,
which made a huge mess, and then manually sifted out the changes that
actually made sense from that pass.

Indeed, this caught quite a few large sections with 2-space indent
level, a couple with 8, and a handful of even weirder things like 3
spaces or 12. This commit fixes them all.

windows/utils/security.c

@@ -175,7 +175,7 @@ bool make_private_security_descriptor(DWORD permissions,
     *error = NULL;
 
     if (!getsids(error))
-      goto cleanup;
+        goto cleanup;
 
     memset(ea, 0, sizeof(ea));
     ea[0].grfAccessPermissions = permissions;