[Help-gnutls] Guide/Doc on porting application from OpenSSL to GnuTLS

[Pascal]

Hi,
 as the Debian packager of mail-notification¹, i'm looking into the
possibility of patching this application to use GnuTLS instead of
OpenSSL.

I've reached a dead end trying to negociate with the upstream author
long time ago².
Users (both Debian² and Ubuntu³) are still asking for SSL/TLS support
(and I understand) so i decided to have a look and see if i could take
action on this.

So i'm kindly asking for links to existing docs or tips for this kind
of process.
Any other relevant help is welcome.

Thanks,

-Pascal
¹ http://www.nongnu.org/mailnotify/
² http://bugs.debian.org/286672
³ https://launchpad.net/distros/ubuntu/+source/mail-notification/+bug/44335
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