merge r2897, r2898, r2899, r2901, r2902, r2904, r2905, r2906, r2907, r2909, r2910, r2922, r2923, r2924, r2925, r2929: various win32 fixes: *) use no-threads for Unix builds only *) Win32 returns ERROR_PATH_NOT_FOUND instead of ERROR_FILE_NOT_FOUND *) add trailing zero to a file name in ngx_win32_rename_file() *) fix logging in ngx_win32_rename_file() *) allow shared memory segments more than 4G *) fix memory leak in successful case *) log shared memory name in failure case *) test that zone has the same addresses in different processes *) add drive letter for Win32 root path *) log GetExitCodeProcess()'s errno *) test premature process termination *) fix debug logging *) exit if no workers could not be started *) do not quit old workers if no new workers could not be started *) a signaller process should stop configuration processing just after it is able to get pid file, this allows to not open log files, etc. *) win32 master process had aready closed listening sockets