Optionally set a separate Javascript server and path

We have about 10-12 JavaScript pages per Web page. They usually
are based on the same server as the Web pages, but since they're
static files, it makes sense to offload them to a lite server that
handles static files well.

This commit lets you set a separate Javascript server and path for the
default Javascript code in StatusNet.

Squashed commit of the following:

commit 139d1622fdafe5ad00c820224416d9021efc3234
Author: Evan Prodromou <evan@status.net>
Date:   Wed Jan 27 11:30:24 2010 -0500

    modules that call htmloutputter::script() don't prescribe js/ path

commit c6ca3174af73efed55eaed5ff1e2a3bdc77d2d87
Author: Evan Prodromou <evan@status.net>
Date:   Wed Jan 27 11:28:07 2010 -0500

    configurable server and path for javascript files

1 files changed, 27 insertions, 1 deletions

diff --git a/lib/htmloutputter.php b/lib/htmloutputter.php
index 31660ce95..317f5ea61 100644
--- a/lib/htmloutputter.php
+++ b/lib/htmloutputter.php
@@ -351,14 +351,40 @@ class HTMLOutputter extends XMLOutputter
     function script($src, $type='text/javascript')
     {
         if(Event::handle('StartScriptElement', array($this,&$src,&$type))) {
+
             $url = parse_url($src);
+
             if( empty($url['scheme']) && empty($url['host']) && empty($url['query']) && empty($url['fragment']))
             {
-                $src = common_path($src) . '?version=' . STATUSNET_VERSION;
+                $path = common_config('javascript', 'path');
+
+                if (empty($path)) {
+                    $path = common_config('site', 'path') . '/js/';
+                }
+
+                if ($path[strlen($path)-1] != '/') {
+                    $path .= '/';
+                }
+
+                if ($path[0] != '/') {
+                    $path = '/'.$path;
+                }
+
+                $server = common_config('javascript', 'server');
+
+                if (empty($server)) {
+                    $server = common_config('site', 'server');
+                }
+
+                // XXX: protocol
+
+                $src = 'http://'.$server.$path.$src . '?version=' . STATUSNET_VERSION;
             }
+
             $this->element('script', array('type' => $type,
                                                    'src' => $src),
                                    ' ');
+
             Event::handle('EndScriptElement', array($this,$src,$type));
         }
     }