Add user post wiping

If a user has spammed a lot of posts and made a mess of the board, this
will allow us to delete all posts by the offending user from the same
IP.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

board/templates/board/post_snippet.html

@@ -8,6 +8,7 @@
     {% if user.is_staff %}
     data-ban-url="{% url 'board:ban_create' board.url post.id %}"
     data-modify-url="{% url 'board:post_modify' post.id %}"
+    data-wipe-url="{% url 'board:post_wipe' post.id %}"
     {% endif %}
     >
 

board/templates/board/post_wipe.html

@@ -0,0 +1,10 @@
+{% extends "board/base.html" %}
+{% load i18n %}
+
+{% block content %}
+    {% blocktranslate %}This will delete {{all_posts_count}} posts.{% endblocktranslate %}
+    <form method="post" {# action="{% url 'board:post_wipe_success' %}" #}>
+        {% csrf_token %}
+        <input type="submit" value="Wipe all posts by this user" />
+    </form>
+{% endblock content %}