Log Message:
- changed DESCR to something shorter and more descriptive.
- changed Makefile indentation to be consistent.
- changed COMMENT to match DESCR (consistency)
- added LICENSE (gnu-gpl-v2 as found in ifstat-1.1/COPYING)
- removed CONFIGURE_ARGS from Makefile in favor of options framework (this \ 
resolves TODO: --with-snmp)
- thus added options.mk
- this is the standalone tool only, disabled library building and removed \ 
library files from PLIST
- added myself as a maintainer

The package builds nice with PKG_DEVELOPER=yes and is IMHO now ready for review.
One could argue the win32 option could be removed.