Add list of singleton pamraeters to custom, refine letsencrypt json

Templates/custom.pm.tem

@@ -2,7 +2,7 @@
 # Generated by ${version} 
 #
 #
-# Routines to be edited by the developer to provide validation for parameters
+# Routines to be edited by the developer to provide content and validation for parameters
 # and provison of the control data for table(s)
 #
 use esmith::util;
@@ -29,8 +29,26 @@ our $ddb = esmith::DomainsDB->open()  || die("Couldn't open Domains db");
 		return $ret;
 	}
 </tal:block>
+
+# Get singleton data for each panel
+<tal:block tal:repeat="panel panels">
+	sub get_data_for_panel_${panel} {
+		# Return a hash with the fields required which will be loaded into the shared data 
+		my $c = shift;
+		my %ret = (
+			'Data1'=>'Data for ${panel}', #Example
+			# fields from Inputs in ${panel} $fields['${panel}']
+			<tal:block tal:repeat="field fields[panel]">
+				'${field}'=>'${field} contents',
+			</tal:block>
+			
+		);
+		return %ret;
+	}
+</tal:block>
+
 	
-# Get control data for tables(s)
+# Get control data for table(s)
 <tal:block tal:repeat="tablecontrol tablecontrols">
 	sub get_${tablecontrol} {
 		# Return an array of hashes of the contents for each row and column for ${tablecontrol}