Update release docs for 2.0

Signed-off-by: Lukas Jungmann <[email protected]>

Author: lukasj

doc/release/CHANGES.txt

@@ -20,6 +20,12 @@ Seven digit bug numbers are from the old Sun bug database, which is no
 longer available.
 
 
+		  CHANGES IN THE 2.0.0 RELEASE
+		  ----------------------------
+The most important change here is the switch from javax to jakarta namespace.
+No bugs have been fixed in the 2.0.0 release.
+
+
 		  CHANGES IN THE 1.6.5 RELEASE
 		  ----------------------------
 The following bugs have been fixed in the 1.6.5 release.

doc/release/COMPAT.txt

@@ -4,6 +4,14 @@
 		    Jakarta Mail API ${mail.version} release
 		    ------------------------------
 
+-- Jakarta Mail 2.0.0 --
+
+The Jakarta Mail 2.0 specification is the successor of the Jakarta
+Mail 1.6 specification. Except new package namespace - jakarta.mail
+there are no changes.
+
+-- Jakarta Mail 1.6.x --
+
 The Jakarta Mail 1.6 specification is fully compatible with the JavaMail
 1.5 specification, with the exceptions listed below.
 

doc/spec/JavaMail-2.0-changes.txt

@@ -0,0 +1,26 @@
+
+		JavaMail 2.0
+		============
+
+		(Updated October 23, 2020)
+
+Following is a description of the changes to the Jakarta Mail
+API introduced in Jakarta Mail 2.0.  The numbers in parentheses
+are bug numbers; you can find more information about the
+bug reports at:
+
+    https://github.com/eclipse-ee4j/mail/issues/<bug number>
+
+Please send comments and feedback to  [email protected].
+
+Jakarta Mail 2.0 will also require at least Java SE 8.
+
+
+===================================================================
+
+1. API package namespace is jakarta.mail
+-----------------------------------------------------------------------------
+
+Previous version of the Jakarta Mail Specification which is based on
+JavaMail 1.6 used javax.mail package namespace.
+New Jakarta Mail Specification uses jakarta.mail package namespace instead.