accdb: rename "(alias)" to "@alias"; alias "@aka" to it
accdb: rename "(alias)" to "@alias"; alias "@aka" to it

Easier to remember, and actually works in filters. ("@@alias=foo" fits
the 'meta' of metadata as well.)

(originally commit f61583acb747de73e50e98dc66c25ba1a81f1c4a in ~/code)

grawity/accdb