Bump the revision used for the guix-data-service, and move to using
Guile 3 rather than 2. Also make it possible to pass options more easily
through the service.

Christopher Baines (2):
  gnu: guix-data-service: Update to 0.0.1-18.18eb9df.
  services: guix-data-service: Allow passing extra options.

 doc/guix.texi         |  6 ++++++
 gnu/packages/web.scm  | 18 +++++++++---------
 gnu/services/guix.scm | 15 +++++++++++----
 3 files changed, 26 insertions(+), 13 deletions(-)