mdoc(7) police: markup nits.

share/man/man7/hier.7

@@ -165,7 +165,8 @@ such as Linux
 .It Pa games/
 useful and semi-frivolous programs
 .It Pa heimdal/
-kerberos server databases; see kdc(8)
+kerberos server databases; see
+.Xr kdc 8
 .It Pa include/
 standard C include files
 .Pp
@@ -716,10 +717,14 @@ system since it was booted
 .Pp
 .Bl -tag -width Fl -compact
 .It Pa named/
-writable by the bind user; see
+writable by the
+.Dq bind
+user; see
 .Xr named 8
 .It Pa ppp/
-writable by the network group for command connection sockets; see
+writable by the
+.Dq network
+group for command connection sockets; see
 .Xr ppp 8
 .It Pa utmp
 database of current users;
@@ -761,7 +766,9 @@ the NIS maps
 .El
 .El
 .Sh NOTES
-This manual page documents the default FreeBSD filesystem layout, but
+This manual page documents the default
+.Fx
+filesystem layout, but
 the actual hierarchy on a given system is defined at the system
 administrator's discretion.
 A well-maintained installation will include a customized version of