support for .tgz packages on 5.x

Hello,

It seems on 5.x that the support for .tgz packages is limited.
You can do a pkg_add for a local .tgz file but pkg_add -r or
pkg_add with a URL (i.e. ftp://) path specifiedwould not work because
it automatically assumes the packages are of the .tbz variety and tries
to uncompress it as a bzip file.

I was just wondering if there was a plan/timeline to add full support for
.tgz packages
because in the code, there are comments about adding support for tgz files.
/* XXX: need to handle .tgz also */.
Also has anyone modified the code on their system to support .tgz packages?

Thanks in advance,
John