1 Add option -O to set the destination directory.
3 Add options --save-headers, --save-body and --save-message to save
4 decoded headers/bodies/messages of parts to files.
10 Allow -d and -p accept shell-like patterns and/or regular expressions:
11 -d content-*,-content-*-encoding
14 Add an option -I to completely skip (remove) subparts -- no headers, no body,
18 Never touch multipart/encrypted and multipart/signed.
24 Extend options -eIi to multipart subparts.
27 Add an option to convert dates to the current locate and timezone.
33 Add option --save-as='%format' to generate names for --save-* files. Develop
34 a DSL to conditionally use values from headers and parameters.