agent: Let gpg-protect-tool pass envvars to pinentry.
* agent/protect-tool.c (opt_session_env): New. (main): Pass session environment object to gnupg_prepare_get_passphrase.
The full story can be found at
https://bugzilla.redhat.com/show_bug.cgi?id=548528
Sorry for the delay.
- GnuPG-bug-id: T1402