Re: [Libguestfs] [PATCH] handle --debug-gc universally via at_exit hook

Several tools handle --debug-gc command-line option, by explicitly forcing GC on every exit path. This is tedious and prone to forgetting some of the exit paths. Instead, add a generic handler for --debug-gc, which installs an at_exit hook to do the GC consistency check, and which can be called right in the command-line parser. Also adjust all users of --debug-gc to use that handler. Signed-off-by: Roman Kagan <rkagan(a)virtuozzo.com&gt;