branch master updated (b98293e -> 9b1cee9)

[Ludovic Courtès]

civodul pushed a change to branch master
in repository guix.

      from  b98293e   import: cran: Accept single URL in addition to single URL.
       new  8c32129   substitute: Gracefully handle TLS errors.
       new  6985335   derivations: Add 'module->source-file-name'.
       new  d26e196   derivations: Raise an error when a module file is not 
found.
       new  d038b67   doc: Add "lightweight desktop" OS config example.
       new  9b1cee9   services: postgresql: Use syslog.

The 5 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.


Summary of changes:
 .gitignore                                         |    1 +
 Makefile.am                                        |    3 +-
 doc.am                                             |    3 +-
 doc/guix.texi                                      |   12 +++++++-
 gnu/services/databases.scm                         |    5 ++-
 gnu/system/examples/desktop.tmpl                   |   20 +++++++------
 .../{desktop.tmpl => lightweight-desktop.tmpl}     |   20 +++++++------
 gnu/system/install.scm                             |    6 +++-
 guix/derivations.scm                               |   29 +++++++++++++++++---
 guix/gexp.scm                                      |    9 +-----
 guix/scripts/substitute.scm                        |   18 +++++++++---
 guix/ui.scm                                        |    5 +++
 tests/derivations.scm                              |    9 ++++++
 13 files changed, 97 insertions(+), 43 deletions(-)
 copy gnu/system/examples/{desktop.tmpl => lightweight-desktop.tmpl} (71%)