passt, qrap, README: Update notes and documentation for AF_UNIX support in qemu

We can't get rid of qrap quite yet, but at least we should start
telling users it's not going to be needed anymore starting from qemu
7.2.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

qrap.1

@@ -5,7 +5,7 @@
 
 .SH NAME
 .B qrap
-\- qemu wrapper connecting UNIX domain socket to file descriptor
+\- temporary qemu wrapper connecting UNIX domain socket to file descriptor
 
 .SH SYNOPSIS
 .B qrap
@@ -47,13 +47,10 @@ $ ./qrap test.qcow2 -m 1024 -display none -nodefaults -nographic
 
 .SH NOTES
 
-This wrapper is temporary and needed only as long as \fBqemu\fR(1) does not
-directly support a UNIX domain socket as \fInetdev\fR back-end.
-
-Out-of-tree patches for \fBqemu\fR(1) introducing support for a UNIX domain
-socket back-end are available at:
-
-	\fIhttps://passt.top/passt/tree/contrib/qemu\fR
+This wrapper is temporary: qemu commit 13c6be96618c ("net: stream: add unix
+socket") introduces native AF_UNIX socket support, and it should be included in
+qemu starting from the 7.2 release. It will be around for a little bit longer to
+give users enough time to switch.
 
 .SH AUTHOR