man: mention that the protocol command accumulates

[kmk3]

As mentioned by @rusty-snake[1].

This amends commit 39654d0 ("adding netlink to --protocol list
(#4605)", 2022-01-21).

See also commit 75073e0 ("man: mention that private-bin and
private-etc are cumulative", 2022-01-22) and issue #4078.

[1] https://github.com/netblue30/firejail/pull/5042/files#r825477891

[rusty-snake]

See also

firejail/RELNOTES

Line 94 in c40ffac

* --protocol now accumulates

5ffd928

---

Maybe we also want to add this to the manpage

firejail/src/firejail/profile.c

Lines 1871 to 1875 in c40ffac

	/* Comma separated list is processed so that:
	* "item" -> adds item to list
	* "-item" -> removes item from list
	* "+item" -> adds item to list
	* "=item" -> clear list, add item

[glitsj16]

LGTM. IMO we should add @rusty-snake's #5043 (comment) too.

[kmk3]

@rusty-snake commented on Mar 13:

See also

firejail/RELNOTES

Line 94 in c40ffac

* --protocol now accumulates

5ffd928

+1

Maybe we also want to add this to the manpage

firejail/src/firejail/profile.c

Lines 1871 to 1875 in c40ffac

	/* Comma separated list is processed so that:
	* "item" -> adds item to list
	* "-item" -> removes item from list
	* "+item" -> adds item to list
	* "=item" -> clear list, add item

I have some reservations and an alternative suggestion regarding this feature,
but it's rather lengthy, so I'll put it in a discussion later.

[glitsj16]

LGTM

[glitsj16]

I have some reservations and an alternative suggestion regarding this feature,
but it's rather lengthy, so I'll put it in a discussion later.

That's fine. I had forgotten about this +, -, = format. We'll pick it up in discussion later :-)

[netblue30]

Merging in, opened a new issue for list accumulation: #5070