make user flags optionally parametric during create

After consideration, this makes things easier for site content importers
and migration tools that move people from other content management
systems onto DTP nodes.

app/services/user.js

@@ -95,21 +95,21 @@ class UserService extends SiteService {
       user.password = maskedPassword;
 
       user.flags = {
-        isAdmin: false,
-        isModerator: false,
-        isEmailVerified: false,
+        isAdmin: userDefinition.isAdmin || false,
+        isModerator: userDefinition.isModerator || false,
+        isEmailVerified: userDefinition.isEmailVerified || false,
       };
 
       user.permissions = {
-        canLogin: true,
-        canChat: true,
-        canComment: true,
-        canReport: true,
+        canLogin: userDefinition.canLogin || true,
+        canChat: userDefinition.canChat || true,
+        canComment: userDefinition.canComment || true,
+        canReport: userDefinition.canReport || true,
       };
 
       user.optIn = {
-        system: true,
-        marketing: false,
+        system: userDefinition.optInSystem || true,
+        marketing: userDefinition.optInMarketing || false,
       };
 
       this.log.info('creating new user account', { email: userDefinition.email });