Revert "When viewing a page in https, all links to non-actions (links to CSS, JS, etc) should be https. Fixes the mixed content warnings that browsers display."

This reverts commit 20997619b3.

The commit doesn't take into account having different servers (theme
server, avatar server) and being able to set HTTPS for some but not all.

lib/util.php

@@ -750,18 +750,8 @@ function common_local_url($action, $args=null, $params=null, $fragment=null)
     return $url;
 }
 
-function common_path($relative, $ssl=null)
+function common_path($relative, $ssl=false)
 {
-    if($ssl==null) {
-        //ssl was not specifically requested
-        if( $_SERVER['HTTPS'] && $_SERVER['HTTPS']!="off" ) {
-            //currently in https, so stay in https
-            $ssl=true;
-        } else {
-            //not in https, so stay not in https
-            $ssl=false;
-        }
-    }
     $pathpart = (common_config('site', 'path')) ? common_config('site', 'path')."/" : '';
 
     if (($ssl && (common_config('site', 'ssl') === 'sometimes'))