add BOB warning

i2p2www/pages/site/docs/api/bob.html

 {% extends "global/layout.html" %}
 {% block title %}{{ _('BOB - Basic Open Bridge') }}{% endblock %}
-{% block lastupdated %}{% trans %}June 2019{% endtrans %}{% endblock %}
+{% block lastupdated %}2020-08{% endtrans %}{% endblock %}
 {% block content %}
-<h2>Language libraries for the BOB API</h2>
-<ul>
-<li>Go - <a href="https://bitbucket.org/kallevedin/ccondom">ccondom</a></li>
-<li>Python - <a href="http://{{ i2pconv('git.repo.i2p') }}/w/i2py-bob.git">i2py-bob</a></li>
-<li>Twisted - <a href="https://pypi.python.org/pypi/txi2p">txi2p</a></li>
-<li>C++ - <a href="https://gitlab.com/rszibele/bobcpp">bobcpp</a></n></li>
-</ul>
-
-<h2>{% trans %}Technical differences from SAMv3{% endtrans %}</h2>
+<h2>Warning - Deprecated</h2>
+<p>Not for use by new applications.
+BOB supports the DSA-SHA1 signature type only.
+BOB will not be extended to support new signature types or other advanced features.
+New applications should use <a href="{{ site_url('docs/api/samv3') }}">SAM V3</a>.
+</p>
 
 <p>{% trans -%}
 At this point, most of the good ideas from BOB have been incorporated into
@@ -19,13 +16,13 @@ is not gaining the advanced features available to SAMv3 and is essentially
 unsupported at this time.
 {%- endtrans %}</p>
 
-<p>
-Alternatives:
-<a href="{{ site_url('docs/api/samv3') }}">SAM V3</a>.
-Older versions:
-<a href="{{ site_url('docs/api/sam') }}">SAM V1</a>,
-<a href="{{ site_url('docs/api/samv2') }}">SAM V2</a>,
-</p>
+<h2>Language libraries for the BOB API</h2>
+<ul>
+<li>Go - <a href="https://bitbucket.org/kallevedin/ccondom">ccondom</a></li>
+<li>Python - <a href="http://{{ i2pconv('git.repo.i2p') }}/w/i2py-bob.git">i2py-bob</a></li>
+<li>Twisted - <a href="https://pypi.python.org/pypi/txi2p">txi2p</a></li>
+<li>C++ - <a href="https://gitlab.com/rszibele/bobcpp">bobcpp</a></n></li>
+</ul>
 
 <h2>{% trans %}Overview{% endtrans %}</h2>