Do something sensible if both -h and -k are given.

Approved by:	re(scottl)

bin/ls/ls.1

@@ -186,6 +186,14 @@ option is specified, print the file size allocation in kilobytes,
 not blocks.
 This option overrides the environment variable
 .Ev BLOCKSIZE .
+Note that
+.Fl k
+is mutually exclusive to
+.Fl h
+and later
+.Fl k
+will nullify earlier
+.Fl h .
 .It Fl l
 (The lowercase letter
 .Dq ell . )

bin/ls/ls.c

@@ -267,6 +267,7 @@ main(int argc, char *argv[])
 			f_inode = 1;
 			break;
 		case 'k':
+			f_humanval = 0;
 			f_kblocks = 1;
 			break;
 		case 'm':