Adding or editing an http or slack target whose address is private or
reserved was refused with no hint that the refusal is deliberate or
that it can be lifted. The refusal now adds that such addresses are
refused by default and that the server's ALLOWED_EGRESS_CIDRS setting
allows named networks, naming the README section "Allowing egress to
your own network". Metadata refusals do not get it: link-local and the
other unconditional metadata addresses cannot be opened, and Azure's
WireServer, which listing does open, serves VM credentials.
The delivery package refuses WireServer with its own error and exports
the private-or-reserved one as ErrBlockedIP, so the handler can tell
them apart.
Model: opus-5-5