branch wip-service-refactor created (now 1c68caa)

[Ludovic Courtès]

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

        at  1c68caa   PRELIM: services: Introduce extensible abstract services.

This branch includes the following new commits:

       new  381d9f8   gexp: Add 'computed-file'.
       new  993e261   gexp: Add 'program-file'.
       new  4d38393   gexp: Add 'mixed-text-file'.
       new  5203476   services: 'mingetty-service' no longer takes monadic 
values.
       new  31e3fdf   system: Make service procedures non-monadic.
       new  2fcba72   PRELIM: services: mingetty-service: Use 
<mingetty-configuration> objects.
       new  ef2f238   PRELIM: services: nscd-service: Fit everything into 
<nscd-configuration>.
       new  1c07d56   gexp: Add 'scheme-file'.
       new  e861a23   system: pam: Use 'computed-file' instead of 
'gexp->derivation'.
       new  5bdc20a   guix system: Add '--derivation'.
       new  ae8de3a   system: Account skeleton API is non-monadic.
       new  3645318   records: Add 'define-record-type†'.
       new  1c68caa   PRELIM: services: Introduce extensible abstract services.

The 13 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.