Hello,

Here's a patch that adds a crash dump service. The concept is simple, a
Guile HTTP server is listening on "dump.guix.gnu.org". Crash reports can
be uploaded using multipart forms in POST requests. They are then stored
on Berlin.

I have implemented the installer dump service. On a crash, it optionally
submits an archive report containing the backtrace, the installer state,
the syslog and dmesg logs.

We could also upload other backtraces that are generated by the "guix"
command itself, when running "guix pull" for instance.

Thanks,

Mathieu