Implement `{when_iso_local}` placeholder
This implements the `{when_iso_local}` placeholder. This is like the
`{when_iso}` placeholder but the output is in the current timezone
rather than UTC.
Resolves#2362
All code relating to a caddytls.Config and setting it up from the
Caddyfile is still intact; only the certificate management-related
code was removed into a separate package.
I don't expect this to build in CI successfully; updating dependencies
and vendor is coming next.
I've also removed the ad-hoc, half-baked storage plugins that we need
to finish making first-class Caddy plugins (they were never documented
anyway). The new certmagic package has a much better storage interface,
and we can finally move toward making a new storage plugin type, but
it shouldn't be configurable in the Caddyfile, I think, since it doesn't
make sense for a Caddy instance to use more than one storage config...
We also have the option of eliminating DNS provider plugins and just
shipping all of lego's DNS providers by using a lego package (the
caddytls/setup.go file has a comment describing how) -- but it doubles
Caddy's binary size by 100% from about 19 MB to around 40 MB...!
* tls: Add support for the tls-alpn-01 challenge
Also updates lego/acme to latest on master.
TODO: This implementation of the tls-alpn challenge is not yet solvable
in a distributed Caddy cluster like the http challenge is.
* build: Allow building with the race detector
* tls: Support distributed solving of the TLS-ALPN-01 challenge
* Update vendor and add a todo in MITM checker
* Adding {when_unix_ms} requests placeholder (unix timestamp with a milliseconds precision)
* Add an 499 HTTP status code on user's cancel request as NGINX doing (instead of 502 Bad Gateway status with 'Context canceled' message)
* 499 HTTP status code was added as constant CustomStatusContextCancelled = 499
* caddytls: Raise TLS alert if no certificate matches SAN (closes#1303)
I don't love this half-baked solution to the issue raised in #1303 way
more than a year after the original issue was closed (the necro comments
are about an issue separate from the original issue that started it),
but I do like TLS alerts more than wrong certificates.
* Restore test to match
* Restore another previous test
* Updates the existing proxy and reverse proxy tests to include a new fallback delay value
* Adds a new fallback_delay sub-directive to the proxy directive and uses it in the creation of single host reverse proxies
