[admin] Add a link to password reset in login form openwisp#19

Implements and closes openwisp#19

openwisp_controller/config/templates/admin/login.html

@@ -0,0 +1,46 @@
+{% extends "admin/login.html" %}
+{% block content %}
+{% if form.errors and not form.non_field_errors %}
+<p class="errornote">
+{% if form.errors.items|length == 1 %}Please correct the error below{% else %}Please correct the errors below{% endif %}
+</p>
+{% endif %}
+
+{% if form.non_field_errors %}
+{% for error in form.non_field_errors %}
+<p class="errornote">
+    {{ error }}
+</p>
+{% endfor %}
+{% endif %}
+
+<div id="content-main">
+
+{% if user.is_authenticated %}
+<p class="errornote">
+{% block trimmed %}
+    You are authenticated as {{ username }}, but are not authorized to
+    access this page. Would you like to login to a different account?
+{% endblock %}
+</p>
+{% endif %}
+
+<form action="{{ app_path }}" method="post" id="login-form">{% csrf_token %}
+  <div class="form-row">
+    {{ form.username.errors }}
+    {{ form.username.label_tag }} {{ form.username }}
+  </div>
+  <div class="form-row">
+    {{ form.password.errors }}
+    {{ form.password.label_tag }} {{ form.password }}
+    <input type="hidden" name="next" value="{{ next }}" />
+  </div>
+  <a href="{% url 'account_reset_password' %}">Forgot Password?</a>
+
+  <div class="submit-row">
+    <input type="submit" value="Log in" />
+  </div>
+</form>
+
+</div>
+{% endblock %}