Cross-reference mergemaster(8) & etcupdate(8).

Suggested by:	Daniel Ebdrup
Reviewed by:	bcr
Approved by:	bcr (doc), krion (mentor, implicit), mat (mentor, implicit)
Differential Revision:	https://reviews.freebsd.org/D18350

usr.sbin/etcupdate/etcupdate.8

@@ -25,7 +25,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd September 29, 2015
+.Dd November 27, 2018
 .Dt ETCUPDATE 8
 .Os
 .Sh NAME
@@ -853,6 +853,7 @@ but it has been removed in the destination directory.
 .Xr make 1 ,
 .Xr newaliases 1 ,
 .Xr sh 1 ,
+.Xr mergemaster 8 ,
 .Xr pwd_mkdb 8 ,
 .Xr services_mkdb 8 ,
 .Xr tzsetup 8

usr.sbin/mergemaster/mergemaster.8

@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd August 8, 2018
+.Dd November 27, 2018
 .Dt MERGEMASTER 8
 .Os
 .Sh NAME
@@ -453,6 +453,7 @@ comparison, use:
 .Xr make 1 ,
 .Xr less 1 ,
 .Xr sdiff 1 ,
+.Xr etcupdate 8 ,
 .Xr pwd_mkdb 8
 .Pp
 .Pa /usr/src/etc/Makefile