components/libdb: upgrade to libdb 5.3.28

Older version of libdb failed to build on aarch64

The error was from config.guess:

"This script, last modified 2006-07-02, has failed
to recognize the operating system you are using."

component/libdb/buildout.cfg

@@ -4,8 +4,8 @@ parts = libdb
 [libdb]
 recipe = slapos.recipe.cmmi
 shared = true
-url = http://download.oracle.com/berkeley-db/db-4.5.20.tar.gz
-md5sum = b0f1c777708cb8e9d37fb47e7ed3312d
+url = https://github.com/berkeleydb/libdb/releases/download/v5.3.28/db-5.3.28.tar.gz
+md5sum = b99454564d5b4479750567031d66fe24
 configure-command = cd build_unix && ../dist/configure
 configure-options =
   --disable-static