Fixed regex captures handling without PCRE. If PCRE is disabled, captures were treated as normal variables in ngx_http_script_compile(), while code calculating flushes array length in ngx_http_compile_complex_value() did not account captures as variables. This could lead to write outside of the array boundary when setting last element to -1. Found with AddressSanitizer.

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.