observations on kmail with gnupg support

Hi all,

here are some things I noticed while trying to get gpg cryptography support in 
kmail working, that would otherwise be left unnoted.

Requirements for "Using OpenPGP and PGP/MIME with KMail >= 1.7" are listed in
http://kmail.kde.org/kmail-pgpmime-howto.html. 

As Raphael already mentioned, from the section "Configure GnuPG to use 
gpg-agent" in this howto only starting the gpg-agent is strictly required for 
gpg support in kmail.

Configuration options in ~/.gnupg/gpg.conf and ~/.gnupg/gpg-agent.conf are not 
required. Options in gpg-agent.conf can be changed via kmail's settings. 
If the line 
	use-agent
is used in gpg.conf, gpg will use the gpg-agent whenever possible. That is, 
gpg run 'inside' an X server will use a gui, and run from a text console will 
use the usual text input when asking for a passphrase.
if 'use-agent' is not set in gpg.conf, then gpg will always use text input for 
that, only kmail will use a gui input widget.

Btw. there's already a lengthy bug report about  the strict dependency of 
kmail on gpg-agent for decryption at 
http://bugs.kde.org/show_bug.cgi?id=92619.

A patch  for full gpg support in kmail is here: 
https://www.rocklinux.net/submaster/smadm.cgi?i=2006012001103700949.

It places the gpg-agent start command in the global config 
file /etc/opt/kde3/env/gpg-agent.sh, so gpg-agent is always enabled when KDE 
is running. I made this config file a part of kdepim because it's only useful 
together with KDE: only startkde will automatically source this file. There 
are no further checks for the availability of gpg-agent, because gnupg2 is 
strictly required for kmail gpg support anyway. 

Have fun!
	Stefan Fiedler