patches for symlink bug, and addition of --prefix switch

[Serafeim Z. <se...@he...>]

tags 349068 patch pending
tags 247340 patch pending
thanks

Hi there,

Please find attached patches for fixing the overwriting of symlinks [1], and
adding a --prefix switch to archivemail [2], along with relevant test cases.
Let me know if you'd like any changes for them to be accepted upstream.

Cheers,
Serafeim

[1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=349068
[2] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=247340