Find and replace all nolint instances refering to the `lll` linter and
replace with `ll` which is the name of our custom version of the `lll`
linter which can be used to ignore log lines during linting.
The next commit will do the configuration of the custom linter and
disable the default one.
fix the signature of the Encode method so that it does in fact implement
the Serializable interface defined in the lnwire21 package. This differs
slightly from the interface defined in the main lnwire package.
To prevent the need to copy the entire onion_error.go file for a new
Mission Control migration, this commit just updates the existing
lnwire21/onion_error.go file with the new CodeInvalidBlinding code. The
lnwire21 should not really ever be updated but adding a new code should
be fine as it does not affect old migrations since this is a new code.
To avoid code changing underneath the static migrations, we copy the
lnwire dependency in its current form into the migration directory.
Ideally the migrations doesn't depend on any code that might change,
this takes us a step closer.
