Add main() entrypoint for all scripts under bin

bin/addpkg

@@ -44,7 +44,7 @@ syslog.addHandler(stderr_handler)
 
 
 # ========== Main Script ==========
-if __name__ == "__main__":
+def main():
     parser = argparse.ArgumentParser()
     parser.add_argument(
         "-c", "--cachedir", help="alternative directory to use for moving package"
@@ -116,3 +116,7 @@ if __name__ == "__main__":
 
     for pkgfile in (*pkg_tarballs, *sigfiles):
         pkgfiles.add(pkgfile, cachedir)
+
+
+if __name__ == "__main__":
+    main()