[imp] PATCH: User configurable attribution text with macros

[Michael M Slusarz]

Quoting Chris Hastie <lists at oak-wood.co.uk>:

| The attached patches to imp/config/prefs.php.dist and
| imp/lib/Compose.php allow a user to configure the text used to attribute
| quoted text in replies.

Cleaned up and applied.  Thanks!

michael

______________________________________________
Michael Slusarz [slusarz at bigworm.colorado.edu]
The University of Colorado at Boulder