adjkerntz.8: use machine independent language

Reported by:	emaste

sbin/adjkerntz/adjkerntz.8

@@ -40,7 +40,7 @@
 The
 .Nm
 utility maintains the proper relationship between the kernel clock, which
-is always set to UTC and the CMOS clock, which may be set to local time.
+is always set to UTC and the real-time clock, which may be set to local time.
 The
 .Nm
 utility also informs the kernel about machine timezone shifts in order to
@@ -54,9 +54,9 @@ installed on the same system rather than fixing broken MS-DOS file
 timestamps.
 If the file
 .Pa /etc/wall_cmos_clock
-exists, it means that the CMOS clock keeps local time
+exists, it means that the real-time clock keeps local time
 .Pq MS-DOS and MS-Windows compatible mode .
-If that file does not exist, it means that the CMOS clock keeps UTC time.
+If that file does not exist, it means that the real-time clock keeps UTC time.
 The
 .Nm
 utility passes this state to the
@@ -79,7 +79,7 @@ on entry to multi-user mode, before any other daemons have been started.
 The
 .Nm
 utility puts itself into the background.
-Then, for a local time CMOS clock,
+Then, for a local time real-time clock,
 .Nm
 reads the local time from it
 and sets the kernel clock to the corresponding UTC time.
@@ -91,7 +91,7 @@ kernel variable, for use by subsequent invocations of
 .Ql adjkerntz -a
 and by local time file systems.
 .Pp
-For a local time CMOS clock
+For a local time real-time clock
 .Ql adjkerntz -i
 pauses and remains inactive as a background daemon until it
 receives a SIGTERM.
@@ -101,13 +101,13 @@ when the system leaves multi-user mode
 .Pq usually, because the system is being shut down .
 After receiving the SIGTERM,
 .Nm
-reads the UTC kernel clock and updates the CMOS clock, if necessary,
+reads the UTC kernel clock and updates the real-time clock, if necessary,
 to ensure that it reflects the current local time zone.
 Then
 .Nm
 exits.
 .It Fl a Op Fl s
-This form is used to update the local time CMOS clock and
+This form is used to update the local time real-time clock and
 .Va machdep.adjkerntz
 kernel variable when time zone changes occur,
 e.g., when entering or leaving daylight savings time.
@@ -118,7 +118,7 @@ the previously stored time zone offset,
 and the changed time zone rule to calculate a new time zone offset.
 It stores the new offset into the
 .Va machdep.adjkerntz
-kernel variable and updates the wall CMOS clock to the new local time.
+kernel variable and updates the wall real-time clock to the new local time.
 If
 .Ql adjkerntz -a
 was started at a nonexistent time
@@ -167,8 +167,8 @@ and
 .Xr zic 8 .
 .It Pa /etc/wall_cmos_clock
 Empty file.
-Its presence indicates that the machine's CMOS clock is set to local
-time, while its absence indicates a UTC CMOS clock.
+Its presence indicates that the machine's real-time clock is set to local
+time, while its absence indicates a UTC real-time clock.
 .El
 .Sh DIAGNOSTICS
 No diagnostics.