Mathieu Othacehe e7c797f348 services: Factorize define-maybe macro. ...

* gnu/services/configuration.scm (id): New procedure extracted from
define-configuration.
(define-maybe): New exported procedure, moved from messaging.scm.
* gnu/services/messaging.scm (define-maybe): Remove it.
(id): Move declaration inside define-all-configurations which is now
the only caller procedure.

Signed-off-by: Clément Lassieur <clement@lassieur.org>

2017-03-24 16:09:17 +01:00

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