master updated (b097379 -> 9e897d8)

[Ludovic Courtès]

civodul pushed a change to branch master.

    from b097379  remote-server: Specify 'system' in build request messages.
     new 5e3e49c  http: "/download" returns 404 rather than 500 for "not found".
     new 103a6ec  http: Gracefully handle missing files in "/download".
     new 9e897d8  'create-build-outputs' registers a GC root on build products.


Summary of changes:
 src/cuirass/base.scm |  1 +
 src/cuirass/http.scm | 19 +++++++++++++------
 2 files changed, 14 insertions(+), 6 deletions(-)