Revert "Disable posting anonymously for now."

This reverts commit 6ee6e1c6.

lms/templates/discussion/_new_post.html

@@ -22,7 +22,7 @@
 </%def>
 
 <article class="new-post-article">
-    <div class="inner-wrapper">
+    <div class="inner-wrapper">        
         <form class="new-post-form">
             <div class="left-column">
                 <label>Create new post about:</label>
@@ -39,6 +39,8 @@
                 </div>
                 <div class="options">
                     <input type="checkbox" name="follow" class="discussion-follow" class="discussion-follow" id="new-post-follow" checked><label for="new-post-follow">follow this post</label>
+                    <br>
+                    <input type="checkbox" name="anonymous" class="discussion-anonymous" id="new-post-anonymous"><label for="new-post-anonymous">post anonymously</label>
                 </div>
             </div>
             <div class="right-column">