if IFA_MAX is not defined.
(IFA_RTA, IFA_PAYLOAD, IFLA_RTA, IFLA_PAYLOAD): Define if not
defined.
* sysdeps/unix/sysv/linux/check_pf.c: Include netlinkaccess.h
instead of asm/types.h, linux/netlink.h and linux/rtnetlink.h.
offset < pstr->valid_raw_len && pstr->offsets_needed case.
Ensure no bytes read before raw_mbs array. Pass a saved copy of
pstr->valid_len - 1 rather than pstr->valid_raw_len - 1 to
re_string_context_at.
* posix/Makefile: Add rules to build and run bug-regex26 test.
* posix/bug-regex26.c: New test.