AC_CHECK_HEADERS(string.h stdlib.h unistd.h dirent.h sys/ioctl.h sys/resource.h)
# check posix headers..
-AC_CHECK_HEADERS(sys/time.h sys/utsname.h regex.h)
+AC_CHECK_HEADERS(sys/time.h sys/utsname.h)
AC_ARG_WITH(socks,
[ --with-socks Build with socks support],