Allow custom URI schemes using markdown

WebEx is preferential to specific uri schemes when using markdown to post a link. Our service uses a link like jamfselfservice://content?entity=policy&id=321&action=view but when using markdown WebEx does not see this as a valid link and won't present it as one. [Link](jamfselfservice://content?entity=policy&id=321&action=view) is a clickable link on macOS devices enrolled in Ford management. Will it be able to support this in the future?