pkgbase: resolve mailer.conf conflict WITHOUT_SENDMAIL

When WITHOUT_SENDMAIL is set, we end up with two different mailer.conf that
conflict, and hilarity ensues. There's currently three different places that
we might install mailer.conf:

- ^/etc/Makefile (package=runtime, contingent on MK_MAIL != no)
- ^/libexec/dma/dmagent/Makefile (package=dma, contingent on MK_SENDMAIL !=
no)
- ^/usr.sbin/mailwrapper/Makefile (package=utilities, contingent on
not-installed)

The mailwrapper installation will effectively never happen because the ^/etc
one will first.

This patch simplifies the whole situation; remove the ^/etc/Makefile version
and install it primarily in mailwrapper if MK_MAILWRAPPER != "no". The
scenarios covered in mailwrapper are:

- sendmail(8) is installed, dma(8) may or may not be installed
- neither sendmail(8) nor dma(8) is installed

In the first scenario, sendmail(8) is dominant so we can go ahead and
install the version in ^/etc/mail. In the unlisted scenario, sendmail(8) is
not installed but dma(8) is, we'll let ^/libexec/dma/dmagent do the
installation. In the second listed scenario, we still want to install an
example mailer.conf so just install the base sendmail(8) version.

Reviewed by:	bapt
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D24924

1 files changed, 4 insertions, 5 deletions

diff --git a/etc/Makefile b/etc/Makefile
index 78a60b6fcb306..8ca259b10a17c 100644
--- a/etc/Makefile
+++ b/etc/Makefile
@@ -17,11 +17,10 @@ SUBDIR+=sendmail
 
 # NB: keep these sorted by MK_* knobs
 
-.if ${MK_SENDMAIL} == "no"
-ETCMAIL=mailer.conf aliases
-.else
-ETCMAIL=Makefile README mailer.conf access.sample virtusertable.sample \
-	mailertable.sample aliases
+ETCMAIL=aliases
+.if ${MK_SENDMAIL} != "no"
+ETCMAIL+=Makefile README access.sample virtusertable.sample \
+	mailertable.sample
 .endif
 
 # Special top level files for FreeBSD