Document 'nacl' value for 'system-type'

* doc/lispref/os.texi (System Environment): Document the 'nacl'
value of 'system-type'.

1 files changed, 4 insertions, 1 deletions

diff --git a/doc/lispref/os.texi b/doc/lispref/os.texi
index 5413437c39d..5b89e1ad581 100644
--- a/doc/lispref/os.texi
+++ b/doc/lispref/os.texi
@@ -902,6 +902,9 @@ Hewlett-Packard HPUX operating system.
 @item irix
 Silicon Graphics Irix system.
 
+@item nacl
+Google Native Client (@acronym{NaCl}) sandboxing system.
+
 @item ms-dos
 Microsoft's DOS@.  Emacs compiled with DJGPP for MS-DOS binds
 @code{system-type} to @code{ms-dos} even when you run it on MS-Windows.
@@ -911,7 +914,7 @@ AT&T Unix System V.
 
 @item windows-nt
 Microsoft Windows NT, 9X and later.  The value of @code{system-type}
-is always @code{windows-nt}, e.g., even on Windows 7.
+is always @code{windows-nt}, e.g., even on Windows 10.
 
 @end table