branch wip-service-refactor created (now dd71a9e)

[Ludovic Courtès]

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

        at  dd71a9e   PRELIM: services: Introduce extensible abstract services.

This branch includes the following new commits:

       new  63e245e   gexp: Add 'computed-file'.
       new  a8ca70e   gexp: Add 'program-file'.
       new  1e6e308   gexp: Add 'mixed-text-file'.
       new  345c3bb   services: 'mingetty-service' no longer takes monadic 
values.
       new  67558a8   system: Make service procedures non-monadic.
       new  4c55d9c   PRELIM: services: mingetty-service: Use 
<mingetty-configuration> objects.
       new  1fd6192   PRELIM: services: nscd-service: Fit everything into 
<nscd-configuration>.
       new  1598967   gexp: Add 'scheme-file'.
       new  ca82e31   system: pam: Use 'computed-file' instead of 
'gexp->derivation'.
       new  3a983b7   guix system: Add '--derivation'.
       new  bbda8d3   system: Account skeleton API is non-monadic.
       new  dd71a9e   PRELIM: services: Introduce extensible abstract 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.