Fix plist (WWWGROUP has never existed)
Remove duplicate @owner/@group entries
Remove now useless @exec entry
Bump portrevision
Remove SUB_LIST it is not actually used
post-install target is now useless
Remove MASTER_SITE_AFTERSTEP from MASTER_SITES. The tarball on that server
does not pass checksum. The tigr.net copy still has the correct checksum,
so leave that in as the sole master_site.

All the files within each tarball had identical checksums.

While here, simplify do-install a bit.
pkg(8) packs empty directories no need to create them in @exec
pkg(8) package empty directories, no need to create them in @exec
Directly package with the right credential the directories with special credentials
Same as with audio/asmixer, ftp.afterstep.org is serving up tarballs with
different checksums. tigr.net has the familiar checksums so make them the
only master_site.
Convert to @sample
pkg(8) already pack empty directories, no need to recreate them
pkg(8) already pack empty directories, no need to recreate them
Convert to @sample
pkg(8) already create empty directories no need to recreate them
Fix MASTER_SITES.
Convert to @sample and remove the useless remove of rc script already done
Do not create already packed empty directories
Simplify plist
Do not create packed empty directories
Convert to @sample
Use @owner to set the credentials
Use @sample