1 Add options --save-headers, --save-body and --save-message to save
2 decoded headers/bodies/messages to files.
8 Allow -d and -p accept shell-like patterns and/or regular expressions:
9 -d content-*,-content-*-encoding
12 Add an option -I to completely skip (remove) subparts -- no headers, no body,
16 Never touch multipart/encrypted and multipart/signed.
22 Extend options -eIi to multipart subparts.
25 Add an option to convert dates to the current locate and timezone.
31 Add option --save-as='%format' to generate names for --save-* files. Develop
32 a DSL to conditionally use values from headers and parameters.