branch wip-service-refactor created (now daf0864)

[Ludovic Courtès]

civodul pushed a change to branch wip-service-refactor
in repository guix.

        at  daf0864   services: Introduce extensible services.

This branch includes the following new commits:

       new  e69274d   gexp: Add 'computed-file'.
       new  34c5ac6   gexp: Add 'program-file'.
       new  326c66b   gexp: Add 'mixed-text-file'.
       new  98f1739   services: 'mingetty-service' no longer takes monadic 
values.
       new  03dc205   system: Make service procedures non-monadic.
       new  8d5cd1e   services: mingetty-service: Use <mingetty-configuration> 
objects.
       new  b2a21df   services: nscd-service: Fit everything into 
<nscd-configuration>.
       new  8f83cf0   gexp: Add 'scheme-file'.
       new  9e1d90c   system: pam: Use 'computed-file' instead of 
'gexp->derivation'.
       new  24932aa   guix system: Add '--derivation'.
       new  2bd09fe   system: Account skeleton API is non-monadic.
       new  daf0864   services: Introduce extensible services.

The 12 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "adds" were already present in the repository and have only
been added to this reference.