Add syslog_tls_certificate_authority field

src/app/helptext/system/advanced.ts

@@ -159,4 +159,8 @@ The system only sends logs matching this level or higher.',
     tooltip: T('The preconfigured system <i>Certificate</i> to use for authenticating\
  the TLS protocol connection to the remote system log server.'),
   },
+
+  syslog_tls_certificate_authority: {
+    placeholder: T('Syslog TLS Certificate Authority'),
+  },
 };

src/app/pages/system/advanced/advanced.component.ts

@@ -355,6 +355,21 @@ export class AdvancedComponent implements OnDestroy {
             },
           ],
         },
+        {
+          type: 'select',
+          name: 'syslog_tls_certificate_authority',
+          placeholder: helptext_system_advanced.syslog_tls_certificate_authority.placeholder,
+          options: [],
+          relation: [
+            {
+              action: 'SHOW',
+              when: [{
+                name: 'syslog_transport',
+                value: 'TLS',
+              }],
+            },
+          ],
+        },
       ],
     },
     { name: 'divider', divider: true },
@@ -413,6 +428,12 @@ export class AdvancedComponent implements OnDestroy {
         syslog_tls_certificate_field.options.push({ label: cert.name, value: cert.id });
       }
     });
+    const syslog_tls_certificate_authority_field = this.fieldSets.config('syslog_tls_certificate_authority');
+    this.ws.call('certificateauthority.query').subscribe((certs) => {
+      for (const cert of certs) {
+        syslog_tls_certificate_authority_field.options.push({ label: cert.name, value: cert.id });
+      }
+    });
   }
   afterInit(entityEdit: any) {
     this.ws.call('failover.licensed').subscribe((is_ha) => {