This release fixes a problem with HTTP/1.1 `CONNECT` requests. When a
server responds to a `CONNECT` request with `content-length` or
`transfer-encoding` headers (in violation of RFC 7231), the proxy must
actively strip these headers to avoid making the Hyper server fail the
response.

This release also fixes an issue with the way proxies discover control
plane components via DNS. When `SRV` records cannot be resolved, the
proxy would no not necessarily fall back to resolving `A` records. This
has been fixed.

Finally, the inbound proxy can now discover policies dynamically. Ports
that are configured in the `LINKERD2_PROXY_INBOUND_PORTS` are discovered
as the proxy starts up; but now the proxy will discover policies for
ports that are not in this list. The pod's default policy is used
initially, but once a policy is received from the control plane it is
used.

---

* build(deps): bump syn from 1.0.93 to 1.0.94 (linkerd/linkerd2-proxy#1664)
* build(deps): bump tj-actions/changed-files from 19 to 20 (linkerd/linkerd2-proxy#1665)
* build(deps): bump rustls from 0.20.4 to 0.20.5 (linkerd/linkerd2-proxy#1666)
* build(deps): bump ryu from 1.0.9 to 1.0.10 (linkerd/linkerd2-proxy#1667)
* build(deps): bump tokio-util from 0.7.1 to 0.7.2 (linkerd/linkerd2-proxy#1668)
* build(deps): bump itoa from 1.0.1 to 1.0.2 (linkerd/linkerd2-proxy#1669)
* build(deps): bump tonic from 0.7.1 to 0.7.2 (linkerd/linkerd2-proxy#1652)
* dns: Fall back to A record when SRV resolution fails (linkerd/linkerd2-proxy#1670)
* Consolidate error chain inspection with `cause_ref` (linkerd/linkerd2-proxy#1671)
* ci: change how warnings are denied on CI (linkerd/linkerd2-proxy#1662)
* build(deps): bump proc-macro2 from 1.0.38 to 1.0.39 (linkerd/linkerd2-proxy#1673)
* build(deps): bump libc from 0.2.125 to 0.2.126 (linkerd/linkerd2-proxy#1674)
* build(deps): bump syn from 1.0.94 to 1.0.95 (linkerd/linkerd2-proxy#1675)
* ci: Use the cargo-action-fmt setup action (linkerd/linkerd2-proxy#1672)
* opencensus: Include empty generated protobuf (linkerd/linkerd2-proxy#1676)
* build(deps): bump rustls from 0.20.5 to 0.20.6 (linkerd/linkerd2-proxy#1679)
* Revert "build(deps): bump socket2 from 0.4.4 to 0.4.5 (linkerd/linkerd2-proxy#1654)" (#1681)
* build(deps): bump EmbarkStudios/cargo-deny-action from 1.2.17 to 1.3.0 (linkerd/linkerd2-proxy#1678)
* build(deps): bump clang-sys from 1.3.1 to 1.3.2 (linkerd/linkerd2-proxy#1680)
* cache: generalize `Cache` into a key-value cache (linkerd/linkerd2-proxy#1683)
* build(deps): bump once_cell from 1.10.0 to 1.11.0 (linkerd/linkerd2-proxy#1687)
* build(deps): bump EmbarkStudios/cargo-deny-action from 1.3.0 to 1.3.1 (linkerd/linkerd2-proxy#1686)
* trace: add `/logs.json` endpoint to admin server (linkerd/linkerd2-proxy#1642)
* Dynamically discover policies for undocumented ports (linkerd/linkerd2-proxy#1677)
* Don't allow a policy to be used if `check_port_allowed` fails (linkerd/linkerd2-proxy#1689)
* ci: Simplify release workflow (linkerd/linkerd2-proxy#1690)
* build(deps): bump petgraph from 0.6.0 to 0.6.1 (linkerd/linkerd2-proxy#1696)
* build(deps): bump actions/upload-artifact from 3.0.0 to 3.1.0 (linkerd/linkerd2-proxy#1692)
* build(deps): bump tj-actions/changed-files from 20 to 20.1 (linkerd/linkerd2-proxy#1693)
* build(deps): bump http-body from 0.4.4 to 0.4.5 (linkerd/linkerd2-proxy#1694)
* build(deps): bump regex from 1.5.5 to 1.5.6 (linkerd/linkerd2-proxy#1695)
* build(deps): bump regex-syntax from 0.6.25 to 0.6.26 (linkerd/linkerd2-proxy#1697)
* http: Strip illegal headers from CONNECT responses (linkerd/linkerd2-proxy#1699)
* dev: Replace `Makefile` with `justfile` (linkerd/linkerd2-proxy#1691)

Signed-off-by: Oliver Gould <[email protected]>