mysql_install_db always has to pass --user=$user to the mysqld

followup for 9d18b624

strangely enough it only failed upgrade test on eoan

scripts/mysql_install_db.sh

@@ -478,9 +478,9 @@ do
   fi
 done
 
-if test -n "$user" -a "$in_rpm" -eq 0
+if test -n "$user"
 then
-  if test -z "$srcdir"
+  if test -z "$srcdir" -a "$in_rpm" -eq 0
   then
     chown 0 "$pamtooldir/auth_pam_tool_dir/auth_pam_tool" && \
     chmod 04755 "$pamtooldir/auth_pam_tool_dir/auth_pam_tool"
@@ -490,7 +490,6 @@ then
         echo "It must be root, the PAM authentication plugin doesn't work otherwise.."
         echo
     fi
-  fi
     chown $user "$pamtooldir/auth_pam_tool_dir" && \
     chmod 0700 "$pamtooldir/auth_pam_tool_dir"
     if test $? -ne 0
@@ -499,6 +498,7 @@ then
         echo "to the '$user' user. Check that you have the necessary permissions and try again."
         echo
     fi
+  fi
   args="$args --user=$user"
 fi