LDAP with IPv6 doesn't work

Right now we do the below with no tcpopts,

(n_0@127.0.0.1)7> eldap:open(["::1"], [{port, 389}]).

{error,"connect failed"}

For ipv6 eldap require specifying tcpopts

(n_0@127.0.0.1)8> eldap:open(["::1"], [{port, 389}, {tcpopts, [inet6]}]).

{ok,<0.231.2>}