Add FAQ entry about requesting new Trove classifiers

.github/ISSUE_TEMPLATE/new-trove-classifier.md

@@ -0,0 +1,11 @@
+Request to add a new Trove classifier.
+
+## The name of the classifier you would like to add
+<!-- Classifier name -->
+
+## Why do you want to add this classifier?
+<!--
+    Please include a brief explanation to justify your request.
+    Why do the current classifiers not meet your need?
+    How many projects do you expect to use this new classifier?
+-->

warehouse/templates/pages/help.html

@@ -37,6 +37,7 @@
 {% macro file_name_reuse() %}Why am I getting a "Filename or contents already exists" or "Filename has been previously used" errors?{% endmacro %}
 {% macro project_name() %}Why isn't my desired project name available?{% endmacro %}
 {% macro project_name_claim() %}How do I claim an abandoned or previously registered project name?{% endmacro %}
+{% macro new_classifier() %}How do I request a new Trove classifier?{% endmacro %}
 {% macro feedback() %}Where can I report a bug or provide feedback?{% endmacro %}
 {% macro maintainers() %}Who maintains PyPI?{% endmacro %}
 {% macro sponsors() %}What powers PyPI?{% endmacro %}
@@ -83,6 +84,7 @@ <h2><a href="#problems">Problems</a></h2>
           <li><a href="#file-size-limit">{{ file_size_limit() }}</a></li>
           <li><a href="#admin-intervention">{{ admin_intervention() }}</a></li>
           <li><a href="#file-name-reuse">{{ file_name_reuse() }}</a></li>
+          <li><a href="#new-classifier">{{ new_classifier() }}</a></li>
           <li><a href="#feedback">{{ feedback() }}</a></li>
         </ul>
       </section>
@@ -252,6 +254,12 @@ <h3 id="file-name-reuse">{{ file_name_reuse() }}</h3>
           To avoid this situation, <a href="https://packaging.python.org/guides/using-testpypi/">use Test PyPI to perform and check your upload first</a>, before uploading to <a href="https://pypi.org">pypi.org</a>.
         </p>
 
+        <h3 id="new-classifier">{{ new_classifier() }}</h3>
+        <p>
+          If you would like to request a new Trove classifier please file a bug on our <a href="https://github.com/pypa/warehouse/issues/new?template=new-trove-classifier.md" target="_blank" rel="noopener">issue tracker</a>. Please include the name of the requested classifier and a brief justification of why it is important.
+        </p>
+        {{ code_of_conduct() }}
+
         <h3 id="feedback">{{ feedback() }}</h3>
         <p>
           We welcome <em>constructive</em> feedback and bug reports via our <a href="https://github.com/pypa/warehouse/issues" target="_blank" rel="noopener">issue tracker</a>. Before writing a new issue, please first check that a similar issue does not already exist.