Fix various man pages to stop abusing the .Bx macro to generate

the strings "FreeBSD" and "NetBSD".  Use the .Fx or .Nx macro
instead.

sbin/dump/dump.8

@@ -391,7 +391,7 @@ for the operator running
 .Nm Dump
 cannot do remote backups without being run as root, due to its
 security history.  This will be fixed in a later version of
-.Bx Free .
+.Fx .
 Presently, it works if you set it setuid (like it used to be), but this
 might constitute a security risk.
 .Sh HISTORY

sbin/fsdb/fsdb.8

@@ -229,13 +229,13 @@ uses the source code for
 to implement most of the file system manipulation code.  The remainder of
 .Nm
 first appeared in
-.Bx Net ,
+.Nx ,
 written by
 .An John T. Kohl .
 .br
 .An Peter Wemm
 ported it to
-.Bx Free .
+.Fx .
 .Sh WARNING
 Use this tool with extreme caution--you can damage an FFS file system
 beyond what

sbin/fsirand/fsirand.8

@@ -104,7 +104,7 @@ This version of
 first appeared in
 .Ox 2.1 .
 A
-.Bx Free
+.Fx
 version first appeared in
 .Fx 2.2.5 .
 .Sh AUTHORS

sbin/ifconfig/ifconfig.8

@@ -329,7 +329,7 @@ Under appletalk, set the interface to respond to a
 .Em netrange.
 of the form startnet-endnet. Appletalk uses this scheme instead of 
 netmasks though
-.Bx Free
+.Fx
 implements it internally as a set of netmasks.
 .It Cm phase
 The argument following this specifies the version (phase) of the 

sbin/mount_nwfs/mount_nwfs.8

@@ -128,7 +128,7 @@ tries to use an environment variable
 Select a
 .Ar scheme 
 used to convert file names between NetWare and
-.Bx Free .
+.Fx .
 Currently only 
 .Ar koi2cp866 
 and 
@@ -186,7 +186,7 @@ to number a few
 
 .Sh CREDITS
 In development of NetWare client for
-.Bx Free ,
+.Fx ,
 the following sources were used:
 .Pp
 Documentation from NetWare NDK.

sbin/mountd/netgroup.5

@@ -83,7 +83,7 @@ are only used in conjunction with
 and local
 .Pa /etc/netgroup
 files are ignored. With
-.Bx Free ,
+.Fx ,
 .Nm Ns s
 can be used with either
 .Tn NIS
@@ -101,7 +101,7 @@ database consists of three separate maps (netgroup, netgroup.byuser
 and netgroup.byhost) that are keyed to allow
 .Fn innetgr 3
 lookups to be done quickly. The
-.Bx Free
+.Fx
 .Nm
 system can interact with the
 .Tn NIS

sbin/newfs/newfs.8

@@ -344,7 +344,7 @@ Mount a 64 MB large memory file system on /tmp, with
 options nosuid and nodev.
 .Sh BUGS
 The boot code of
-.Bx Free
+.Fx
 assumes that the file system that carries the
 kernel has blocks of 8 kilobytes and fragments of 1 kilobyte. You will
 not be able to boot from a file system that uses another size.

sbin/nos-tun/nos-tun.8

@@ -50,7 +50,7 @@ If you configure the tunnel against a cisco router, use a netmask of
 .Dq 255.255.255.252
 on the cisco.  This is because the tunnel is a point-to-point interface
 in the
-.Bx Free
+.Fx
 end, a concept cisco doesn't really implement.
 .Pp
 .Ar Protocol number
@@ -62,7 +62,7 @@ is the address of the remote tunnel device, this must match the source
 address set on the remote end.
 .Sh EXAMPLES
 This end, a
-.Bx Free
+.Fx
 box on address 192.168.59.34:
 .Bd -literal -offset indent 4m 
 nos-tun -t /dev/tun0 -s 192.168.61.1 -d 192.168.61.2 192.168.56.45

usr.sbin/mount_nwfs/mount_nwfs.8

@@ -128,7 +128,7 @@ tries to use an environment variable
 Select a
 .Ar scheme 
 used to convert file names between NetWare and
-.Bx Free .
+.Fx .
 Currently only 
 .Ar koi2cp866 
 and 
@@ -186,7 +186,7 @@ to number a few
 
 .Sh CREDITS
 In development of NetWare client for
-.Bx Free ,
+.Fx ,
 the following sources were used:
 .Pp
 Documentation from NetWare NDK.

usr.sbin/mountd/netgroup.5

@@ -83,7 +83,7 @@ are only used in conjunction with
 and local
 .Pa /etc/netgroup
 files are ignored. With
-.Bx Free ,
+.Fx ,
 .Nm Ns s
 can be used with either
 .Tn NIS
@@ -101,7 +101,7 @@ database consists of three separate maps (netgroup, netgroup.byuser
 and netgroup.byhost) that are keyed to allow
 .Fn innetgr 3
 lookups to be done quickly. The
-.Bx Free
+.Fx
 .Nm
 system can interact with the
 .Tn NIS