agent: New option --pinentry-formatted-passphrase
* agent/agent.h (opt): Add field pinentry_formatted_passphrase. * agent/call-pinentry.c (setup_formatted_passphrase): New. (agent_get_passphrase): Pass option to pinentry. * agent/gpg-agent.c (oPinentryFormattedPassphrase): New. (opts): Add option. (parse_rereadable_options): Set option.
This is a squashed backport of two commits from master.
Backport-from-master: bf20a80f68449cc83b67c53ba9a0a84c45827ac4
Backport-from-master: 99601778f4a9dc1c9fee792361c959f5e0732cfd