Provide a new make.conf knob, SENDMAIL_SUBMIT_MC to allow users to pick

the .mc file used for /etc/mail/submit.cf.  By default,
/etc/mail/freebsd.submit.mc is installed and used.

Requested by:	fenner
Submitted by:	ume
MFC after:	1 week

2 files changed, 17 insertions, 0 deletions

diff --git a/share/examples/etc/make.conf b/share/examples/etc/make.conf
index cffcaa7..2e60cb9c 100644
--- a/share/examples/etc/make.conf
+++ b/share/examples/etc/make.conf
@@ -258,6 +258,13 @@
 #
 #SENDMAIL_MC=/etc/mail/myconfig.mc
 #
+# The following sets the default m4 configuration file for mail
+# submission to use at install time.  Use with caution as a make
+# install will overwrite any existing /etc/mail/submit.cf.  The
+# value should be a fully qualified path name.
+#
+#SENDMAIL_SUBMIT_MC=/etc/mail/mysubmit.mc
+#
 # If you need to build additional .cf files during a make buildworld,
 # include the full paths to the .mc files in SENDMAIL_ADDITIONAL_MC.
 #
diff --git a/share/man/man5/make.conf.5 b/share/man/man5/make.conf.5
index c98484f..e183550 100644
--- a/share/man/man5/make.conf.5
+++ b/share/man/man5/make.conf.5
@@ -520,6 +520,16 @@ Use with caution as a make install will overwrite any existing
 Note that
 .Va SENDMAIL_CF
 is now deprecated.
+.It Va SENDMAIL_SUBMIT_MC
+.Pq Vt str
+The default m4 configuration file for mail submission
+to use at install time.
+The value should include the full path to the
+.Pa .mc
+file, e.g.,
+.Pa /etc/mail/mysubmit.mc .
+Use with caution as a make install will overwrite any existing
+.Pa /etc/mail/submit.cf .
 .It Va SENDMAIL_ADDITIONAL_MC
 .Pq Vt str
 Additional