Remove offensive terminology

[ydahhrk]

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=49decddd39e5f6132ccd7d9fdc3d7c470b0061bb:

For symbol names and documentation, avoid introducing new usage of
'master / slave' (or 'slave' independent of 'master') and 'blacklist /
whitelist'.

(...)

Recommended replacements for 'blacklist/whitelist' are:
'denylist / allowlist'
'blocklist / passlist'

Exceptions for introducing new usage is to maintain a userspace ABI/API,
or when updating code for an existing (as of 2020) hardware or protocol
specification that mandates those terms. For new specifications
translate specification usage of the terminology to the kernel coding
standard where possible.

Starting from Jool v4.1.4, "denylist4" will replace "blacklist4," and the latter will become a deprecated alias.

Tentatively, the alias "blacklist4" will be dropped on Jool v5.0.0. (Though it's entirely possible the migration to nftables might negate the necessity for the table.)

Thanks to @dhfelix for reporting this.

[ydahhrk]

4.1.4 released; blacklist4 is now deprecated.

Waiting for version 5.0.0...