Fixed capabilities version. Previously, capset(2) was called with the 64-bit capabilities version _LINUX_CAPABILITY_VERSION_3. With this version Linux kernel expected two copies of struct __user_cap_data_struct, while only one was submitted. As a result, random stack memory was accessed and random capabilities were requested by the worker. This sometimes caused capset() errors. Now the 32-bit version _LINUX_CAPABILITY_VERSION_1 is used instead. This is OK since CAP_NET_RAW is a 32-bit capability (CAP_NET_RAW = 13).

# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


cat << END >> $NGX_AUTO_CONFIG_H

#ifndef $have
#define $have  0
#endif

END