UPSTREAM: Documentation: ip-sysctl.txt: document addr_gen_mode

addr_gen_mode was introduced in without documentation, add it now.

Fixes: d35a00b8e33d ("net/ipv6: allow sysctl to change link-local address generation mode")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit f168db5e25f762b96d00ffd8c3908cf4066741dd)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I89df4f69976e19ff5664d1099d092fd335a4fba7
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
1 file changed