While we could use posix_memalign(3), that is not fully portable. Further, it
might be difficult on some platforms to properly catch it in leak-detective,
which results in invalid free()s when releasing such memory.
We instead use a simple wrapper, which allocates larger data, and saves the
padding size in the allocated header. This requires that memory is released
using a dedicated function.
To reduce the risk of invalid free() when working on corrupted data, we fill up
all the padding with the padding length, and verify it during free_align().
As it is currently unclear what the "three-letter-timezone" for CEST is, we
use the German timezone, which actually is CET/CEST. SetEnvironmentVariable()
"TZ" does not seem to affect localtime(), so we use _putenv() instead.
Andreas Steffen