Update stale references to update(4) with references to the new

syncer(4) manual page.

bin/sync/sync.8

@@ -64,7 +64,7 @@ function call.
 .Sh SEE ALSO
 .Xr fsync 2 ,
 .Xr sync 2 ,
-.Xr update 4 ,
+.Xr syncer 4 ,
 .Xr halt 8 ,
 .Xr reboot 8
 .Sh HISTORY

lib/libc/gen/sysctl.3

@@ -437,7 +437,7 @@ followed by the vnode itself
 The interval between
 .Xr sync 2
 calls in the
-.Xr update 4
+.Xr syncer 4
 process.
 .El
 .Ss CTL_MACHDEP

lib/libc/sys/fsync.2

@@ -97,7 +97,7 @@ An I/O error occurred while reading from or writing to the file system.
 .El
 .Sh SEE ALSO
 .Xr sync 2 ,
-.Xr update 4 ,
+.Xr syncer 4 ,
 .Xr sync 8
 .Sh HISTORY
 The

lib/libc/sys/sync.2

@@ -57,7 +57,7 @@ As information in the cache is lost after a system crash a
 call is issued
 frequently
 by the user process
-.Xr update 4
+.Xr syncer 4
 (about every 30 seconds). 
 .Pp
 The function
@@ -66,7 +66,7 @@ may be used to synchronize individual file descriptor
 attributes.
 .Sh SEE ALSO
 .Xr fsync 2 ,
-.Xr update 4 ,
+.Xr syncer 4 ,
 .Xr sync 8
 .Sh BUGS
 .Fn Sync