* Switch from PORTVERSION to DISTVERSION
* Clean up MASTER_SITES and use upstream main site as backup
* Switch to xz release tarball
* Use helpers whenever possible and USES= localbase:ldflags
* Sort CONFIGURE_ARGS as they're listed when executing
./configure --help
* Sort OPTIONS
* Rearrange Makefile to closer match Porters Handbook
PR: 280279
Reviewed by: kbowling
