Update help text for USE_SSL settings and Provision function.

Removed (commented out) Update DNS button and associated help.

languages/en_US/helptext.txt

@@ -1135,14 +1135,25 @@ Enable (default) or disable the UPnP function on the server. This function allow
 :mgmt_use_ssl_tls_help:
 Determines how the webGUI responds to HTTP and/or HTTPS protocol on your LAN.
 
-Select **No** to disable HTTPS.
+Select **No** to use HTTP. To access your server use this URL:
 
-Select **Yes** to enable HTTPS and redirect HTTP to HTTPS. A
-self-signed SSL certificate will be generated automatically if a Let's Encrypt SSL certificate has not been provisioned.
+`http://<server-name>.<localTLD>`
 
-Select **Auto** if you have *Provisioned* a Let's Encrypt SSL
-certificate.  In this case webGUI access will use HTTPS with the Let's Encrypt
-certificate exclusively.  Note that a DNS sever must also be reachable.
+or this URL:
+
+`http://<server-ip-address>`
+
+Select **Yes** to enable use of an automatically-generated self-signed
+SSL certificate.  Use this URL to access your server:
+
+`https://<server-name>.<localTLD>`
+
+Note that use of a self-signed SSL certificate will generate a browser
+warning.
+
+Select **Auto** to enable *exclusive* use of an Unraid.net SSL
+certificate for https access (see **Provision** below).  Note that a DNS
+server must be reachable.
 
 Important: **Auto** may not be selectable if your router or upstream DNS server has
 [DNS rebinding protection](https://en.wikipedia.org/wiki/DNS_rebinding) enabled. DNS rebinding
@@ -1192,10 +1203,29 @@ Enter your local Top Level Domain. May be blank.
 :end
 
 :mgmt_certificate_expiration_help:
-**Provision** may be used to install a *free* SSL Certficiate from
-[Let's Encrypt](https://letsencrypt.org/), if the server is signed in to unraid.net.
+**Provision** may be used to install a *free* Unraid.net SSL Certificate from
+[Let's Encrypt](https://letsencrypt.org/).
 
-After a Let's Encrypt SSL Certificate has been installed, two
+The Unraid.net SSL certificate can be used in two ways.  First,
+having the certificate present enables your server to respond to an
+alternate URL of the form:
+
+`https://<lan-ip>.<hash>.myunraid.net`
+
+The `<hash>` value is a 40-character hex string (160 bits) unique to
+your server.  A Lime Technology DDNS server will return your `<lan-ip>`
+in response to a DNS request on this URL. The certificate Subject is
+set to `*.<hash>.myunraid.net` thus validating the https connection.
+
+You may enable this URL exclusively on your LAN by setting **Use
+SSL/TLS** to **Auto**.
+
+The second use for an Unraid.net certificate is to enable secure
+remote access available through the My Servers plugin feature.  Note
+that it is possible to use secure remote access in conjunction with
+insecure local access.
+
+After an Unraid.net SSL Certificate has been installed, two
 background services are activated while the server is signed in to unraid.net:
 
 - *updatedns* - This starts 30 seconds after server reboot has completed and contacts the Lime Technology
@@ -1203,15 +1233,11 @@ DNS service to register the servers local IP address. Thereafter it wakes up eve
 the local IP address has changed.
 
 - *renewcert* - This starts 60 seconds after server reboot has completed and contacts the Lime Technology
-certificate renewal service to determine if your Let's Encrypt SSL certificate needs to be renewed.
+certificate renewal service to determine if your Unraid.net SSL certificate needs to be renewed.
 Thereafter it wakes up every 24 hours. If within 30 days of expiration, a new certificate is automatically
 provisioned and downloaded to your server.
 
-**Delete** may be used to delete the Let's Encrypt certificate file.
-
-**Update DNS** may be used to manually initiate updating the DNS A-record of your server FQDN on unraid.net, assuming the server is signed in. Note
-that world-wide DNS propagation could take anywhere from 1 minute to several hours (we set TTL to 60 seconds). For
-this reason, we also recommend assigning a static IP address to the server on your LAN.
+**Delete** may be used to delete the Unraid.net certificate file.
 
 **nginx certificate handling details**
 
@@ -1219,7 +1245,7 @@ nginx makes use of two certificate files stored on the USB flash boot device:<br
 
 - a self-signed certificate: `config/ssl/certs/<server-name>_unraid_bundle.pem`
 
-- a Let's Encrypt certificate: `config/ssl/certs/certificate_bundle.pem`
+- an Unraid.net certificate: `config/ssl/certs/certificate_bundle.pem`
 
 The self-signed SSL certificate file is automatically created when nginx
 starts; and re-created if the server hostname or local TLD is changed.

plugins/dynamix/ManagementAccess.page

@@ -310,7 +310,7 @@ _(CA-signed certificate file)_:
 
 <?endif;?>
 &nbsp;
-: <button type="submit" name="changePorts" value="Provision" <?=$disabled_provision?>><?=$provisionlabel?></button><button type="submit" name="changePorts" value="Delete" <?=$disabled_delete?> >_(Delete)_</button><button type="button" onclick="updateDNS(this)" <?=$disabled_updatedns?>>_(Update DNS)_</button>
+: <button type="submit" name="changePorts" value="Provision" <?=$disabled_provision?>><?=$provisionlabel?></button><button type="submit" name="changePorts" value="Delete" <?=$disabled_delete?> >_(Delete)_</button><!-- <button type="button" onclick="updateDNS(this)" <?=$disabled_updatedns?>>_(Update DNS)_</button> -->
 
 <?if ($certPresent && $isLegacyCert):?>
 &nbsp;