SSI: return NGX_ERROR when timefmt memory allocation failed. Previously, when using NGX_HTTP_SSI_ERROR, error was ignored in ssi processing, thus timefmt could be accessed later in ngx_http_ssi_date_gmt_local_variable() as part of "set" handler, or NULL format pointer could be passed to strftime().

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.