Remove Certificate Providers / Fix #950

Signed-off-by: Marius Blüm <marius@lineone.io>

management/templates/ssl.html

@@ -55,7 +55,7 @@
 
 <h3 id="ssl_install_header">Install certificate</h3>
 
-<p>There are many other places where you can get a free or cheap certificate. If you don't want to use our automatic Let's Encrypt integration, you can give <a href="https://www.namecheap.com/security/ssl-certificates/domain-validation.aspx">Namecheap&rsquo;s $9 certificate</a>, <a href="https://www.startssl.com/">StartSSL&rsquo;s free express lane</a>, <a href="https://buy.wosign.com/free/">WoSign&rsquo;s free TLS</a></a> or any other certificate provider a try.</p>
+<p>If you don't want to use our automatic Let's Encrypt integration, you can give any other certificate provider a try. You can generate the needed CSR below.</p>
 
 <p>Which domain are you getting a certificate for?</p>