opensmtpd: add mailq symlink.

srcpkgs/opensmtpd/template

@@ -1,7 +1,7 @@
 # Template file for 'opensmtpd'
 pkgname=opensmtpd
 version=5.9.2p1
-revision=4
+revision=5
 build_style=gnu-configure
 configure_args="--sysconfdir=/etc/smtpd --sbindir=/usr/bin
  --with-path-socket=/run --with-mantype=doc --with-pie --with-table-db
@@ -41,7 +41,7 @@ pre_configure() {
 	sed -ri 's,/etc/mail,/etc/smtpd,g' smtpd/smtpd.conf
 }
 post_install() {
-	for f in newaliases makemap sendmail; do
+	for f in newaliases mailq makemap sendmail; do
 		ln -s smtpctl ${DESTDIR}/usr/bin/$f
 	done
 	vsv opensmtpd