astobj2: Unregister debug CLI commands at exit

(issue ASTERISK-22467)
Reported by: Corey Farrell
Patches:
    astobj2-clean-debug-cli-1.8-11.patch uploaded by coreyfarrell (license 5909)
    astobj2-clean-debug-cli-12up.patch uploaded by coreyfarrell (license 5909)
........

Merged revisions 401781 from http://svn.asterisk.org/svn/asterisk/branches/1.8


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/11@401783 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/astobj2.c

@@ -1710,12 +1710,18 @@ static struct ast_cli_entry cli_astobj2[] = {
 	AST_CLI_DEFINE(handle_astobj2_stats, "Print astobj2 statistics"),
 	AST_CLI_DEFINE(handle_astobj2_test, "Test astobj2"),
 };
+
+static void astobj2_cleanup(void)
+{
+	ast_cli_unregister_multiple(cli_astobj2, ARRAY_LEN(cli_astobj2));
+}
 #endif /* AO2_DEBUG */
 
 int astobj2_init(void)
 {
 #ifdef AO2_DEBUG
 	ast_cli_register_multiple(cli_astobj2, ARRAY_LEN(cli_astobj2));
+	ast_register_atexit(astobj2_cleanup);
 #endif
 
 	return 0;