developer is officially maintaining the package.
The rationale for changing this from "tech-pkg" to "pkgsrc-users" is
that it implies that any user can try to maintain the package (by
submitting patches to the mailing list). Since the folks most likely
to care about the package are the folks that want to use it or are
already using it, this would leverage the energy of users who aren't
developers.
xmlto is a front-end to an XSL toolchain. It chooses an appropriate
stylesheet for the conversion you want and applies it using an
external XSL-T processor. It also performs any necessary post-processing.