edsp: rename and drop very-draft warnings

doc/apt-solver-protocol.mdwn

@@ -1,5 +1,3 @@
-** TENTATIVE PROPOSAL, VERY VERY VERY DRAFT **
-
 # APT External Dependency Solver Protocol (EDSP) - version 0.3
 
 This document describes the communication protocol between APT and
@@ -295,6 +293,3 @@ order, include:
   enable APT to translate error messages
 - structured error data to explain failures in terms of packages and
   dependencies
-
-
-** TENTATIVE PROPOSAL, VERY VERY VERY DRAFT **