[Dovecot] xz compression support

[Attila Nagy]

  Hello,

Just wondering: Dovecot has gzip/bzip2 compression/decompression support.
According to this: 
http://stephane.lesimple.fr/wiki/blog/lzop_vs_compress_vs_gzip_vs_bzip2_vs_lzma_vs_lzma2-xz_benchmark_reloaded 
gzip and bzip2 aren't really useful together.
While gzip can offer speed and a reasonable amount of compression ratio, 
bzip2 is slow, especially on decompression, which Dovecot does more 
frequently than compression (1 vs many).

So: is it planned to include xz (liblzma) support? It would be useful 
especially for compressing old mails in the background (due to the 
resource intensity of the compression phase).

Thanks,