Improve spelling and capitalize "Kerberos".

MFC after:	2 weeks
Sponsored by:	DARPA, AFRL

share/man/man7/hier.7

@@ -28,7 +28,7 @@
 .\"	@(#)hier.7	8.1 (Berkeley) 6/5/93
 .\" $FreeBSD$
 .\"
-.Dd April 2, 2018
+.Dd June 18, 2018
 .Dt HIER 7
 .Os
 .Sh NAME
@@ -474,7 +474,7 @@ Handbook
 .It Pa ja/
 Japanese translations of documents in /usr/share/doc
 .It Pa legal/
-License files for vendor supplied firmwares
+License files for vendor supplied firmware files
 .It Pa ncurses/
 HTML documents pertaining to ncurses;
 see
@@ -623,7 +623,7 @@ utilities covered by the GNU General Public License
 source code for files in
 .Pa /usr/include
 .It Pa kerberos5/
-build infrastructure for kerberos version 5
+build infrastructure for Kerberos version 5
 .It Pa lib/
 source code for files in
 .Pa /lib
@@ -801,7 +801,7 @@ for privilege separation.
 .It Pa games/
 miscellaneous game status and score files
 .It Pa heimdal/
-kerberos server databases; see
+Kerberos server databases; see
 .Xr kdc 8
 .It Pa log/
 miscellaneous system log files