Find attached the patch I promised to send to you. Please note that there

Find attached the patch I promised to send to you. Please note that there
are three new source files (src/rrd_is_thread_safe.h, src/rrd_thread_safe.c
and src/rrd_not_thread_safe.c) and the introduction of librrd_th. This
library is identical to librrd, but it contains support code for per-thread
global variables currently used for error information only. This is similar
to how errno per-thread variables are implemented.  librrd_th must be linked
alongside of libpthred

There is also a new file "THREADS", holding some documentation.

-- Peter Stamfest <peter@stamfest.at>

git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@180 a5681a0c-68f1-0310-ab6d-d61299d08faa