Upstream keepalive: clearing of c->data in cached connections. Previously, connections returned from keepalive cache had c->data pointing to the keepalive cache item. While this shouldn't be a problem for correct code, as c->data is not expected to be used before it is set, explicitly clearing it might help to avoid confusion.

make -f misc/GNUmakefile release

the required tools:
*) xsltproc to build CHANGES,
*) xslscript.pl ( http://hg.nginx.org/xslscript ) to build XSLTs
   from XSLScript sources.


make -f misc/GNUmakefile icons

the required tool:
*) netpbm to create Win32 icons from xpm sources.