Make "human-readable" (-H/-h) output also "humanize" inode counts.

Base 10 is always used for the inode counts as I could not think of any
reason base 2 inode counts would be useful.

Minor mdoc markup fix to df(1) while here anyway.

MFC after:	3 weeks

1 files changed, 7 insertions, 2 deletions

diff --git a/bin/df/df.1 b/bin/df/df.1
index 7d4253d..8ed6fc6 100644
--- a/bin/df/df.1
+++ b/bin/df/df.1
@@ -78,15 +78,20 @@ this overrides the
 .Ev BLOCKSIZE
 specification from the environment.
 .It Fl H
-"Human-readable" output.
+.Dq Human-readable
+output.
 Use unit suffixes: Byte, Kilobyte, Megabyte,
 Gigabyte, Terabyte and Petabyte in order to reduce the number of
 digits to four or fewer using base 10 for sizes.
 .It Fl h
-"Human-readable" output.
+.Dq Human-readable
+output.
 Use unit suffixes: Byte, Kilobyte, Megabyte,
 Gigabyte, Terabyte and Petabyte in order to reduce the number of
 digits to four or fewer using base 2 for sizes.
+Inodes statistics, if enabled with
+.Fl i ,
+are always printed in base 10.
 .It Fl i
 Include statistics on the number of free inodes.
 .It Fl k