udhcpc6: support stateless DHCPv6

-l will send Information-Request to request configuration parameters

function                                             old     new   delta
packed_usage                                       33114   33180     +66
send_d6_info_request                                   -      62     +62
udhcpc6_main                                        2534    2593     +59
udhcpc6_longopts                                     199     211     +12
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(add/remove: 1/0 grow/shrink: 3/0 up/down: 199/0)             Total: 199 bytes

Signed-off-by: Eivind Versvik <versvikeivind@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
1 file changed