[SA-exim] Compile SA against current exim

[Torsten Mueller]

Hello,

i remember, that it wasn't possible for me to compile
SA cleanly against a current exim version.
I remember too, that Marc wrote "To be honest, I'm pretty sure the last 
released version may not work as is anymore."
Is there a chance, that SA will be moved to 4.2.2, which compiles
against 4.76 (RC1). I would be very happy about this.

Thank you
Torsten