do not create/use ghost log; let application create log; remove log on erase

postfix/postfix.spec

@@ -253,7 +253,7 @@ Conflicts:    sendmail, ssmtp, exim
           flush incoming private saved
       %{l_shtool} mkdir -f -p -m 730 maildrop
       %{l_shtool} mkdir -f -p -m 710 public
-      %{l_shtool} mkdir -f -p -m 755 pid )
+      %{l_shtool} mkdir -f -p -m 755 log pid )
 
     #   install addons
     ( cd pflogsumm-%{V_pflogsumm}
@@ -279,18 +279,11 @@ Conflicts:    sendmail, ssmtp, exim
         %{SOURCE fsl.postfix} \
         $RPM_BUILD_ROOT%{l_prefix}/etc/fsl/
 
-    #   install ghost log
-    %{l_shtool} mkdir -f -p -m 755 \
-        $RPM_BUILD_ROOT%{l_prefix}/var/postfix/log
-    %{l_shtool} install -c /dev/null \
-        $RPM_BUILD_ROOT%{l_prefix}/var/postfix/log/postfix.log
-
     #   generate file list
     %{l_rpmtool} files -v -ofiles -r$RPM_BUILD_ROOT \
         %{l_files_std} \
         '%not %dir %{l_prefix}/etc/fsl' \
         '%config %{l_prefix}/etc/fsl/fsl.postfix' \
-        '%ghost %attr(644,%{l_musr},%{l_mgrp}) %{l_prefix}/var/postfix/log/postfix.log' \
         '%attr(-,%{l_susr},%{l_mgrp}) %{l_prefix}/etc/postfix' \
         '%config %attr(-,%{l_susr},%{l_mgrp}) %{l_prefix}/etc/postfix/*' \
         '%attr(-,%{l_susr},%{l_mgrp}) %{l_prefix}/libexec/postfix/*' \
@@ -326,9 +319,10 @@ Conflicts:    sendmail, ssmtp, exim
     exit 0
 
 %preun
-    #   before erase, stop service
+    #   before erase, stop service and remove log files
     [ $1 -eq 0 ] || exit 0
     %{l_rc} postfix stop 2>/dev/null
+    rm -f $RPM_INSTALL_PREFIX/var/postfix/log/postfix.log* >/dev/null 2>&1 || true
     #   remove generated configuration files
     (cd $RPM_INSTALL_PREFIX/etc/postfix/; %{l_make} clean >/dev/null 2>&1 || true)
     #   remove generated run-time files and directories