security/acme-client: improve some help messages

security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/dialogValidation.xml

@@ -21,7 +21,7 @@
         <id>validation.method</id>
         <label>Validation Method</label>
         <type>dropdown</type>
-        <help><![CDATA[Set the Let's Encrypt validation method.]]></help>
+        <help><![CDATA[Set the Let's Encrypt validation method. You'll have to add configuration for the selected method below.]]></help>
     </field>
     <field>
         <label>HTTP-01</label>
@@ -98,7 +98,7 @@
         <id>validation.dns_sleep</id>
         <label>Sleep Time</label>
         <type>text</type>
-        <help><![CDATA[The time in seconds to wait for all the TXT records to take effect DNS API mode. Default 120 seconds.]]></help>
+        <help><![CDATA[The time in seconds to wait for all the TXT records to take effect after adding them to the DNS API. Defaults to 120 seconds.]]></help>
     </field>
     <field>
         <label>DNS-01/Alwaysdata</label>

security/acme-client/src/opnsense/mvc/app/controllers/OPNsense/AcmeClient/forms/settings.xml

@@ -3,13 +3,13 @@
         <id>acmeclient.settings.enabled</id>
         <label>Enable Plugin</label>
         <type>checkbox</type>
-        <help><![CDATA[Enable Let's Encrypt plugin]]></help>
+        <help><![CDATA[Enable Let's Encrypt plugin.]]></help>
     </field>
     <field>
         <id>acmeclient.settings.autoRenewal</id>
         <label>Auto Renewal</label>
         <type>checkbox</type>
-        <help><![CDATA[Enable automatic renewal for certificates to prevent expiration.]]></help>
+        <help><![CDATA[Enable automatic renewal for certificates to prevent expiration. This will add a cronjob to the system. You may want to customize the cronjob schedule to your needs, because re-issueing a certificate may lead to a short downtime, depending on the selected validation method and service.]]></help>
     </field>
     <field>
         <id>acmeclient.settings.environment</id>