userdefined variables in muttrc

[Jonas Meurer <jonas@freesources.org>]

hello,

i have two different gpg commands which i would like to use for gnupg
encryption/signing depending on the from: header.

as the mutt configuration has lots of variables set for gnupg support,
a send-hook which defines all of them would be very complex.

is it possible to set a userdefined variable in the send-hook
(gpg_command for example) and use this on ($gpg_command) in all global
pgp_* definitions?

or is there a smarter way to configure two different environments for
different sender profiles?

...
 jonas