+Add an option -I to completely skip (remove) subparts -- no headers, no body,
+nothing.
+
+
+Extend options -eIi to multipart subparts.
+
+
+Never touch multipart/encrypted and multipart/signed.
+
+
+Add an option to convert dates to the current locale and timezone.
+
+
+Allow -d and -p accept shell-like patterns and/or regular expressions:
+-d content-*,-content-*-encoding
+
+
+Add option --save-as='%format' to generate names for --save-* files. Develop
+a DSL to conditionally use values from headers and parameters.