Patch that:

Patch that:

1) Creates safe_calloc, suggested by Scott McKellar which includes
memset, as calloc does.  safe_malloc will eventually lose its call
to memset.

2) Creates a macro in utils.h called osrf_clearbuf which

 * under CLFAGS=-DNDEBUG fills the buffer with !s and a trailing nul
 * otherwise (currently) uses memset to fill with nuls

The secondary behavior should be changed to a no-op after no more
problems arise under NDEBUG mode.  I reversed the suggested semantics
because I'm not ready to completely break trunk.  To break everything
(AKA find where we should be providing a terminal nul) just compile
like this:

 $ CLFAGS=-DNDEBUG make clean all

3) replaces all memsets (excepting the ones in safe_?alloc) that act
on char bufs with said macro, so they can be spotted and improved to
deal with nul terminators where needed.  I didn't touch any memsets on
struct pointers.

4) made jid_get_*() from src/libopensrf/transport_message.c safe for
use with NDEBUG mode.  They were depending on the target buffer that
the caller passes in to be nul-filled (they use strncpy/memcpy which
don't guarantee terminal nul) -- now they provide their own terminal
nul.

git-svn-id: svn://svn.open-ils.org/OpenSRF/trunk@1099 9efc2488-bf62-4759-914b-345cdb29e865