Update for 20.4.0-rc2

.version

-20.4.0-rc1
+20.4.0-rc2

CHANGES.md

-ChangeLogs/ChangeLog-20.4.0-rc1.md
+ChangeLogs/ChangeLog-20.4.0-rc2.md
\ No newline at end of file

ChangeLogs/ChangeLog-20.4.0-rc2.md

+
+Change Log for Release 20.4.0-rc2
+========================================
+
+Links:
+----------------------------------------
+
+ - [Full ChangeLog](https://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLog-20.4.0-rc2.md)  
+ - [GitHub Diff](https://github.com/asterisk/asterisk/compare/20.4.0-rc1...20.4.0-rc2)  
+ - [Tarball](https://downloads.asterisk.org/pub/telephony/asterisk/asterisk-20.4.0-rc2.tar.gz)  
+ - [Downloads](https://downloads.asterisk.org/pub/telephony/asterisk)  
+
+Summary:
+----------------------------------------
+
+- app.h: Move declaration of ast_getdata_result before its first use
+- doc: Remove obsolete CHANGES-staging and UPGRADE-staging
+
+User Notes:
+----------------------------------------
+
+
+Upgrade Notes:
+----------------------------------------
+
+
+Closed Issues:
+----------------------------------------
+
+  - #200: [bug]: Regression: In app.h an enum is used before its declaration.
+
+Commits By Author:
+----------------------------------------
+
+- ### George Joseph (2):
+  - doc: Remove obsolete CHANGES-staging and UPGRADE-staging
+  - app.h: Move declaration of ast_getdata_result before its first use
+
+
+Detail:
+----------------------------------------
+
+- ### app.h: Move declaration of ast_getdata_result before its first use
+  Author: George Joseph  
+  Date:   2023-07-10  
+
+  The ast_app_getdata() and ast_app_getdata_terminator() declarations
+  in app.h were changed recently to return enum ast_getdata_result
+  (which is how they were defined in app.c).  The existing
+  declaration of ast_getdata_result in app.h was about 1000 lines
+  after those functions however so under certain circumstances,
+  a "use before declaration" error was thrown by the compiler.
+  The declaration of the enum was therefore moved to before those
+  functions.
+
+  Resolves: #200
+
+- ### doc: Remove obsolete CHANGES-staging and UPGRADE-staging
+  Author: George Joseph  
+  Date:   2023-07-10  
+
+