[PATCH 6/8] man/man7/unix.7: ERRORS: EPROTONOSUPPORT: Protocol 0 is also accepted

["Günther Noack" <gnoack3000@gmail.com>]

unix_create() in linux.git net/unix/af_unix.c starts with this check:

	if (protocol && protocol != PF_UNIX)
        	return -EPROTONOSUPPORT;

Therefore, not only AF_UNIX (a.k.a. PF_UNIX) is accepted as a protocol
value in the unix(7) socket(2) invocation, but also 0.  0 is the usual
value, and is also given as example in the SYNOPSIS at the top of
unix(7).

Fixes: 9d1fd1157306 (1999-06-15, 2022-12-19; "man-pages 1.24")
Cc: Kuniyuki Iwashima <kuniyu@google.com>
Assisted-by: LLM
Signed-off-by: Günther Noack <gnoack3000@gmail.com>
---

Notes:
    I double checked it in the code.

 man/man7/unix.7 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/man/man7/unix.7 b/man/man7/unix.7
index 29843235def0..054f1af75dd5 100644
--- a/man/man7/unix.7
+++ b/man/man7/unix.7
@@ -729,7 +729,7 @@ or
 .BR sendmsg (2).
 .TP
 .B EPROTONOSUPPORT
-Passed protocol is not
+Passed protocol is neither 0 nor
 .BR AF_UNIX .
 .TP
 .B EPROTOTYPE
-- 
2.56.0