aii/ks: support for sending mail in el9 using correct s-nail format

Current mailx options used in aii doesn't seem to send mail when s-nail is used,
provide correct options when s-nail binary exists.

aii-ks/src/main/perl/ks.pm

@@ -1079,6 +1079,9 @@ sub kspostreboot_header
 
  my $mailx_smtp = "";
  $mailx_smtp .= " smtp=$tree->{mail}->{smtp}" if $tree->{mail}->{smtp};
+ # support for s-nail on el9
+ my $snail_smtp = "";
+ $snail_smtp .= " -Smta=smtp://$tree->{mail}->{smtp}" if $tree->{mail}->{smtp};
 
  print <<EOF;
 #!/bin/bash
@@ -1099,7 +1102,11 @@ fail() {
  echo "Quattor installation on $fqdn failed: \\\$1"
  subject="[\\`date +'%x %R %z'\\`] Quattor installation on $fqdn failed: \\\$1"
  if [ -x /usr/bin/mailx ]; then
- env MAILRC=/dev/null from=root\@$fqdn $mailx_smtp mailx -s "\\\$subject" $rootmail <<End_of_mailx
+ mailx_options="from=root\@$fqdn $mailx_smtp mailx"
+ if [ -x /usr/bin/s-nail ]; then
+ mailx_options="mailx -:/ -Sfrom=root\@$fqdn $snail_smtp"
+ fi
+ env MAILRC=/dev/null \\\$mailx_options -s "\\\$subject" $rootmail <<End_of_mailx
 
 \\`cat $logfile\\`
 ------------------------------------------------------------
@@ -1132,7 +1139,11 @@ success() {
 
  subject="[\\`date +'%x %R %z'\\`] Quattor installation on $fqdn succeeded"
  if [ -x /usr/bin/mailx ]; then
- env MAILRC=/dev/null from=root\@$fqdn $mailx_smtp mailx -s "\\\$subject" $rootmail <<End_of_mailx
+ mailx_options="from=root\@$fqdn $mailx_smtp mailx"
+ if [ -x /usr/bin/s-nail ]; then
+ mailx_options="mailx -:/ -Sfrom=root\@$fqdn $snail_smtp"
+ fi
+ env MAILRC=/dev/null \\\$mailx_options -s "\\\$subject" $rootmail <<End_of_mailx
 
 Node $fqdn successfully installed.