Jamie Lynn Spears and Britney Spears have been going at it in public in the wake of Jamie’s new autobiography, “Things I Should Have Said.” The issue is Britney’s now-defunct conservatorship and Jamie’s alleged lack of support for ending it. Jamie is set to share a text message that Britney sent her in a two-part episode with the “Call Her Daddy” podcast that will allegedly clear her name. It drops today.