Reverting empty defsearch changes in last two commits. Leaving in JS catches.

vimperator/content/bookmarks.js

@@ -259,7 +259,7 @@ function Bookmarks() //{{{
         "string", "google",
         {
             completer: function completer(context) completion.search(context, true),
-            validator: function validator(value) value == "" || Option.validateCompleter.call(this, value)
+            validator: Option.validateCompleter
         });
 
     options.add(["preload"],

vimperator/locale/en-US/options.txt

@@ -247,9 +247,6 @@ This means, it you set 'defsearch' to "youtube", then [c]:open arnold
 schwarzenegger[c] will be exactly the same as [c]:open youtube arnold
 schwarzenegger[c]. Therefore, you need to add a keyword or search engine
 "youtube" first.
-
-If 'defsearch' is empty, then Firefox will always attempt to open the
-raw [[arg]].
 ____