Add information about the new options to newfs and tunefs which set the

expected average file size and number of files per directory.  Could do
with some fleshing out.

sbin/newfs/newfs.8

@@ -50,6 +50,8 @@
 .Op Fl d Ar rotdelay
 .Op Fl e Ar maxbpg
 .Op Fl f Ar frag-size
+.Op Fl g Ar avgfilesize
+.Op Fl h Ar avfpdir
 .Op Fl i Ar bytes
 .Op Fl k Ar skew
 .Op Fl l Ar interleave
@@ -200,6 +202,10 @@ ranging in value between
 and
 .Ar blocksize .
 The default is 1024 bytes.
+.It Fl g Ar avgfilesize
+The expected average file size for the file system.
+.It Fl h Ar avgfpdir
+The expected average number of files per directory on the file system.
 .It Fl i Ar number of bytes per inode
 Specify the density of inodes in the file system.
 The default is to create an inode for every

sbin/tunefs/tunefs.8

@@ -44,11 +44,13 @@
 .Op Fl a Ar maxcontig
 .Op Fl d Ar rotdelay
 .Op Fl e Ar maxbpg
+.Op Fl f Ar avgfilesize
 .Op Fl m Ar minfree
 .Bk -words
 .Op Fl n Ar enable | disable
 .Op Fl o Ar space | time
 .Op Fl p
+.Op Fl s Ar avgfpdir
 .Ek
 .Ar special | Ar filesystem
 .Sh DESCRIPTION
@@ -92,6 +94,8 @@ more frequently than if they were allowed to allocate all the blocks
 in a cylinder group before seeking elsewhere.
 For file systems with exclusively large files,
 this parameter should be set higher.
+.It Fl f Ar avgfilezsize
+Specify the expected average file size.
 .It Fl m Ar minfree
 Specify the percentage of space held back
 from normal users; the minimum free space threshold.
@@ -122,6 +126,8 @@ are on the selected file system.  More detailed information can be
 obtained in the
 .Xr dumpfs 8
 manual page.
+.It Fl s Ar avgfpdir
+Specify the expected number of files per directory.
 .El
 .Pp
 At least one of the above flags is required.