Formatting: realign labels and case/default statements.

My aim has always been to have those back-dented by 2 spaces (half an
indent level) compared to the statements around them, so that in
particular switch statements have distinct alignment for the
statement, the cases and the interior code without consuming two whole
indent levels.

This patch sweeps up all the violations of that principle found by my
bulk-reindentation exercise.

windows/utils/security.c

@@ -155,7 +155,7 @@ static bool getsids(char **error)
 
     ret = true;
 
- cleanup:
+  cleanup:
     return ret;
 }