This bring the first Keyword into the ports tree.
Keywords are pkgng custom plist keyword definition.
info.yaml defines a new @info keyword usable only with pkgng which will:
- add the info agument to the file list
- set a post-installation execution script
- set a post-deinstallation execution script
in keyword definition the script uses the same format (%f, %F, %D, ...) as @exec/@unexec does
it just add a new one: %@ which correspond the the keyword argument line.
Exp-run: miwi
