landlock: Minor typo and grammar fixes in IPC scoping documentation

* Fix some whitespace, punctuation and minor grammar.
* Add a missing sentence about the minimum ABI version,
  to stay in line with the section next to it.

Cc: Tahera Fahimi <fahimitahera@gmail.com>
Cc: Tanya Agarwal <tanyaagarwal25699@gmail.com>
Signed-off-by: Günther Noack <gnoack@google.com>
Link: https://lore.kernel.org/r/20250124154445.162841-1-gnoack@google.com
[mic: Add newlines, update doc date]
Signed-off-by: Mickaël Salaün <mic@digikod.net>

Author: gnoack

Documentation/userspace-api/landlock.rst

@@ -8,7 +8,7 @@ Landlock: unprivileged access control
 =====================================
 
 :Author: Mickaël Salaün
-:Date: October 2024
+:Date: January 2025
 
 The goal of Landlock is to enable restriction of ambient rights (e.g. global
 filesystem or network access) for a set of processes.  Because Landlock
@@ -329,11 +329,11 @@ non-sandboxed process, we can specify this restriction with
 A sandboxed process can connect to a non-sandboxed process when its domain is
 not scoped. If a process's domain is scoped, it can only connect to sockets
 created by processes in the same scope.
-Moreover, If a process is scoped to send signal to a non-scoped process, it can
+Moreover, if a process is scoped to send signal to a non-scoped process, it can
 only send signals to processes in the same scope.
 
 A connected datagram socket behaves like a stream socket when its domain is
-scoped, meaning if the domain is scoped after the socket is connected , it can
+scoped, meaning if the domain is scoped after the socket is connected, it can
 still :manpage:`send(2)` data just like a stream socket.  However, in the same
 scenario, a non-connected datagram socket cannot send data (with
 :manpage:`sendto(2)`) outside its scope.

include/uapi/linux/landlock.h

@@ -268,7 +268,9 @@ struct landlock_net_port_attr {
  * ~~~~~~~~~~~~~~~~
  *
  * These flags enable to restrict a sandboxed process to a set of network
- * actions. This is supported since the Landlock ABI version 4.
+ * actions.
+ *
+ * This is supported since Landlock ABI version 4.
  *
  * The following access rights apply to TCP port numbers:
  *
@@ -291,11 +293,13 @@ struct landlock_net_port_attr {
  * Setting a flag for a ruleset will isolate the Landlock domain to forbid
  * connections to resources outside the domain.
  *
+ * This is supported since Landlock ABI version 6.
+ *
  * Scopes:
  *
  * - %LANDLOCK_SCOPE_ABSTRACT_UNIX_SOCKET: Restrict a sandboxed process from
  *   connecting to an abstract UNIX socket created by a process outside the
- *   related Landlock domain (e.g. a parent domain or a non-sandboxed process).
+ *   related Landlock domain (e.g., a parent domain or a non-sandboxed process).
  * - %LANDLOCK_SCOPE_SIGNAL: Restrict a sandboxed process from sending a signal
  *   to another process outside the domain.
  */