Separate rpmdb data to rpmdb table, left join via %rpm% field name on demand.

As the rpmdb data is huge comparing to other data, it's best we keep it
in separate table, if it is still a performance problem, we could use
separate datafile.

--- dokuwiki-plugin-data-20100608/db/latest.version	2010-11-03 15:20:30.000000000 +0200
+++ dokuwiki-plugin-data-20100608/db/latest.version	2010-12-01 19:50:59.214345000 +0200
@@ -1 +1 @@
-4
+5
--- dokuwiki-plugin-data-20100608/helper.php	2010-12-01 19:51:15.127904142 +0200
+++ dokuwiki-plugin-data-20100608/helper.php	2010-12-01 19:50:59.217678000 +0200
@@ -182,7 +182,9 @@
         // fix title for special columns
         static $specials = array('%title%'  => array('page', 'title'),
                                  '%pageid%' => array('title', 'page'),
-                                 '%class%'  => array('class'));
+                                 '%class%'  => array('class'),
+                                 '%rpm%'    => array('rpm'),
+                                );
         if (isset($specials[$column['title']])) {
             $s = $specials[$column['title']];
             $column['title'] = $this->getLang($s[0]);
--- dokuwiki-plugin-data-20100608/lang/en/lang.php	2010-11-03 15:20:30.000000000 +0200
+++ dokuwiki-plugin-data-20100608/lang/en/lang.php	2010-12-01 19:50:59.217678000 +0200
@@ -16,6 +16,7 @@
 $lang['page']      = 'Page';
 $lang['title']     = 'Page Name';
 $lang['class']     = 'Page Class';
+$lang['rpm']       = 'RPM Package';
 
 $lang['name']      = 'Type Alias';
 $lang['type']      = 'Original Type';
--- dokuwiki-plugin-data-20100608/syntax/table.php	2010-11-03 15:20:30.000000000 +0200
+++ dokuwiki-plugin-data-20100608/syntax/table.php	2010-12-01 19:50:59.217678000 +0200
@@ -328,6 +328,13 @@
                 $select[] = '" " || pages.class';
             }elseif($key == '%title%'){
                 $select[] = "pages.page || '|' || pages.title";
+            }elseif($key == '%rpm%'){
+                if(!isset($tables[$key])){
+                    $tables[$key] = 'T'.(++$cnt);
+                    $from  .= ' LEFT JOIN rpmdb AS '.$tables[$key].' ON '.$tables[$key].'.pid = pages.pid';
+                }
+                $select[] = "group_concat(".$tables[$key].".value,'\n')";
+
             }else{
                 if(!isset($tables[$key])){
                     $tables[$key] = 'T'.(++$cnt);