postfix: add sendmail to ALTERNATIVE_${PN}

There are several packages provide ${sbindir}/sendmail
and should add sendmail to ALTERNATIVE_${PN}
to make it work well.

And the sendmail is removed from ALTERNATIVE_${PN}
in below commit:

===
commit 7b500488115c67d657312135b48027a1c26e0955
Author: Lei Maohui <leimaohui@cn.fujitsu.com>
Date:   Fri Aug 17 18:19:53 2018 -0700

    postfix,esmtp: Fix confilct error in do_rootfs

    Error: Transaction check error:
      file /usr/bin/mailq conflicts between attempted installs of esmtp-1.2-r0.x86_64 and postfix-3.2.2-r0.x86_64
      file /usr/bin/newaliases conflicts between attempted installs of esmtp-1.2-r0.x86_64 and postfix-3.2.2-r0.x86_64

    Signed-off-by: Lei Maohui <leimaohui@cn.fujitsu.com>
    Signed-off-by: Khem Raj <raj.khem@gmail.com>
===

Add it back to make sendmail works normally

before adding it back:
 # mime-construct --to root --subject mail-20826 --encoding 7bit --string mail_content

 sendmail: account default not found: no configuration file available
 Error closing sendmail: non-zero exit (78) at /usr/bin/mime-construct line 572.
 # echo $?
 78

After adding it back:
 # mime-construct --to root --subject mail-20826 --encoding 7bit --string mail_content
 # echo $?
 0

Signed-off-by: Mingli Yu <Mingli.Yu@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/meta-networking/recipes-daemons/postfix/postfix.inc b/meta-networking/recipes-daemons/postfix/postfix.inc
index 389136b52..49f9f7b1f 100644
--- a/meta-networking/recipes-daemons/postfix/postfix.inc
+++ b/meta-networking/recipes-daemons/postfix/postfix.inc
@@ -214,9 +214,11 @@ do_install_append_class-native() {
     ln -sf ../sbin/sendmail.postfix ${D}${bindir}/mailq
 }
 
-ALTERNATIVE_${PN} += "mailq newaliases"
+ALTERNATIVE_${PN} += "sendmail mailq newaliases"
 ALTERNATIVE_TARGET[mailq] = "${bindir}/mailq"
 ALTERNATIVE_TARGET[newaliases] = "${bindir}/newaliases"
+ALTERNATIVE_TARGET[sendmail] = "${sbindir}/sendmail.postfix"
+ALTERNATIVE_LINK_NAME[sendmail] = "${sbindir}/sendmail"
 
 ALTERNATIVE_PRIORITY = "120"