[Dovecot] xz compression support

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_l... 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,