* Rename ECH, bump draft number

* AliasForm new treatment

* alpn is no longer mandatory by default

* Document the non-empty value requirement

* new test cases

* more test cases

* Continue forbidding v4-map-v6 but not v4-embed-v6

#1067 (comment) and MikeBishop/dns-alt-svc#361

* Update documentation

* revert rename ech

* Reword AliasMode with key=value pairs

* Invalid NSEC/3 bitmap on non-zero buffer

If the PackBuffer is used to encode an NSEC/3 record, the bitmap is
xored with the content of the buffer instead of being zeroed first.

The algorithm has been changed so it is able zero bytes without
losing too much performance (around 2x slower).

* Add some comments + rename some vars to make algo clearer

* Revert to previous algo with window length compute+0 on new window

* Use typeBitMapLen to compute the bitmap length to zero

Of course the wording was changed (for the better) in an errata:
https://www.rfc-editor.org/errata/eid193

We still followed the original RFC4034 text. Note I haven't given this
much thought, just changed the 2 into a 3 and ran the test.

Fixes: #1352

Signed-off-by: Miek Gieben <[email protected]>

Signed-off-by: Miek Gieben <[email protected]>

* Add SVCB dohpath key

The parameter is being added in [its own IETF draft][1] and also being used in
the [IETF draft about Descovery of Designated Resolvers][2].

Additionally, the mappings of the numeric key values to strings are exported,
under names consistent with the already existing exported mappings, to make it
easier for the clients of the module to validate and print SVCB keys.

Testing was done by sending SVCB queries for the "_dns.resolver.arpa" domain to
OpenDNS's 146.112.41.2 server.

[1]: https://datatracker.ietf.org/doc/html/draft-ietf-add-svcb-dns-02
[2]: https://datatracker.ietf.org/doc/html/draft-ietf-add-ddr-06.html

* Fix template length, docs; reverse some changes

* Remove incorrect validations; improve docs

* Add notes about SVCB draft changes to SVCB-related API

* Decrease number of warnings, rephrase

Small fix in the examples to properly work with v6 addresses.

Closes: #1365 #1367

Signed-off-by: Miek Gieben <[email protected]>

Signed-off-by: Miek Gieben <[email protected]>

* Modify the SVCBAlpn to properly parse/print

* Remove debug

* Change SVCB test from reflect to loop

* Refactor SVCB code to reduce indentation

* When stringifying SVCBAlpn, use strings.Builder for whole process

* Update comment in svcb.go

Co-authored-by: Miek Gieben <[email protected]>

* Describe why we use a specific size for the alpn buffer

Co-authored-by: Miek Gieben <[email protected]>

* dohpath escaped in String(), and parsed such values

* Update the test for dohpath with escaping

* Fix cut & paste error with svcdohpath error

* Disallow names that start with '.' in IsDomainName()

* Also update packDomain()

Add 'in the type bitmap' to make clear where in the RR the error occurs.
Also use 'NSEC(3)' - as this code is shared between NSEC and NSEC3, the
first error used NSECx.

Technically backwards incompatible, but checking strings in errors as
bad practice (although this lib lacks library types).

See #1373

Signed-off-by: Miek Gieben <[email protected]>

This was broken by PR: #1322

Make it public as TsigGenerateWithProvider and update the docs a little.
And TsigVerifyWithProvider also - tweak those docs also a little.

Signed-off-by: Miek Gieben <[email protected]>