* Impose a throttle on OPER attempts regardless of whether they caused a
password check.
* Never disconnect the client on a failed attempt, even if there was a
password check.
* Change error numeric to ERR_NOOPERHOST
* Explicit information about the failure in the server log (copying Insp)
Fixes#2296.
They are validated by test message, but it would have been possible
to add an http url.
If an http url was added, it's still possible to remove it via
NS PUSH DELETE.
* spec update: metadata keys are lowercase
* add batch parameter to metadata batches
* fix: connecting clients receive METADATA, not RPL_KEYVALUE
* spec update: send RPL_METADATASUBS in a metadata-subs batch
* move some helpers
* bump irctest to forked hash
This is https://github.com/progval/irctest/pull/314 but I don't want to
couple the merges
* fix: empty value is valid
* fix: deleting a nonexistent key gets a FAIL
* metadata spec update: disallow colon entirely
* refactor key validation
* implement metadata before-connect
* play the metadata in reg burst to all clients with the cap
* bump irctest
* remove all case normalization for keys
From spec discussion, we will most likely either require keys to be lowercase,
or else treat them as case-opaque, similar to message tag keys.
* refactoring
* send an empty batch if necessary, as per spec
* don't broadcast no-op updates
* don't trim spaces before validating the key
* bump irctest to cover metadata
* replay existing metadata to reattaching always-on clients
* use canonicalized name everywhere
* use utils.SafeErrorParam in FAIL lines
* validate key names for sub
* fix error for METADATA CLEAR
* max-keys is enforced for channels as well
* remove unlimited configurations
* maintain the limit exactly without off-by-one cases
* add final channel registration check
* nickserv.go: Update FAIL codes to match spec
* handlers.go: Fix FAIL code
* use ACCOUNT_EXISTS for errNameReserved
* bump irctest to development version
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Co-authored-by: Valerie Liu <79415174+ValwareIRC@users.noreply.github.com>
