Bug fixes

• Fixed the elb_application_lb_waf_enabled query to correctly flag ELB application load balancers as alarm when the associated WAF is disabled. (#840)
• Fixed the cloudfront_distribution_custom_origins_encryption_in_transit_enabled query to remove duplicate AWS CloudFront distributions from the result. (#829) (Thanks to @sbldevnet for the contribution!)
• Fixed the where clause of the cloudfront_distribution_use_secure_cipher query to correctly check if the CloudFront distributions have insecure cipher protocols. (#827) (Thanks to @sbldevnet for the contribution!)