no-op instead of crash on spurious :dns binding creation retries
++ do-create
|= [him=ship for=ship try=@ud]
^+ this
- =/ tar (~(got by pen.nam) him)
+ =/ pending (~(get by pen.nam) him)
+ ?~ pending
+ this
+ =* tar u.pending
=/ =wire
(http-wire try /create/(scot %p him)/for/(scot %p for))
=/ pre=(unit [id=@ta tar=target])
