Add sample databases for sendmail (access, mailertable, virtusertable),

as well as rename access.txt back to the standard access.  Also modify
the Makefile to know how to build hashes for each of these databases.
If one of the databases is missing when Make is run, use a commented
out version of the sample.

Reviewed by:	peter
Approved by:	jkh

etc/mail/Makefile

@@ -1,6 +1,31 @@
 # $FreeBSD$
 
-install:
-	/usr/sbin/makemap hash /etc/mail/access < /etc/mail/access.txt
+all: access.db mailertable.db virtusertable.db	\
+# /etc/aliases.db
 
-all: install
+access.db: access
+	/usr/sbin/makemap hash access < access
+
+virtusertable.db: virtusertable
+	/usr/sbin/makemap hash virtusertable < virtusertable
+
+mailertable.db: mailertable
+	/usr/sbin/makemap hash mailertable < mailertable
+
+#/etc/aliases.db: /etc/aliases
+#	newaliases
+	
+mailertable:
+	@echo Generating empty mailertable
+	sed -e 's/^/#/' < mailertable.sample > mailertable
+
+access:
+	@echo Generating empty access
+	sed -e 's/^/#/' < access.sample > access
+
+virtusertable:
+	@echo Generating empty virtusertable
+	sed -e 's/^/#/' < virtusertable.sample > virtusertable
+
+clean:
+	rm -f access.db virtusertable.db mailertable.db

etc/mail/access.sample

@@ -0,0 +1,10 @@
+# $FreeBSD $
+#
+# Mail relay access control list.  Default is to reject mail unless the
+# destination is local, or listed in /etc/mail/sendmail.cw
+#
+cyberspammer.com		550 We don't accept mail from spammers
+FREE.STEALTH.MAILER@		550 We don't accept mail from spammers
+another.source.of.spam		REJECT
+okay.cyberspammer.com		OK
+128.32				RELAY

etc/mail/mailertable.sample

@@ -0,0 +1,7 @@
+# $FreeBSD $
+#
+# List of domains (possibly wildcarded) and destination mailers
+#
+.my.domain		xnet:%1.my.domain
+uuhost1.my.domain	suucp:uuhost1
+.bitnet			smtp:relay.bit.net

etc/mail/virtusertable.sample

@@ -0,0 +1,11 @@
+# $FreeBSD $
+#
+# Map one or all usernames at a source hostname to a specific (or the same)
+# username at another target hostname.  Remember to add the source hostname
+# to /etc/mail/sendmail.cw so that sendmail will accept mail for the
+# source hostname.
+#
+username@a.sample.hostname	localuser
+username@a.sample.hostname	specificuser@a.possibly.different.hostname
+@another.sample.hostname	specificuser@a.possibly.different.hostname
+@yet.another.sample.hostname	%1@a.possibly.different.hostname