branch master updated (c180533 -> 7b44cae)

[Ludovic Courtès]

civodul pushed a change to branch master
in repository guix.

      from  c180533   gnu: subread: Update to 1.5.1.
       new  1bc4d0c   doc: Fix 'ntp-service' typo.
       new  183605c   services: herd: Provide <live-service> objects.
       new  b8692e4   guix system: Extract and test the service upgrade 
procedure.
       new  a5d78eb   services: shepherd: Add 
'shepherd-service-lookup-procedure'.
       new  f20a7b8   guix system: Use 'shepherd-service-lookup-procedure' in 
'service-upgrade'.
       new  6673bdd   services: shepherd: Parameterize 
'shepherd-service-back-edges'.
       new  d4f8884   guix system: Do not unload services depended on.
       new  7b44cae   services: shepherd: Add 'shepherd-service-upgrade', from 
'guix system'.

The 8 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:
 doc/guix.texi             |    2 +-
 gnu/services/herd.scm     |   37 ++++++++++--------
 gnu/services/shepherd.scm |   94 ++++++++++++++++++++++++++++++++++++++-------
 gnu/tests/base.scm        |   12 +++---
 guix/scripts/system.scm   |   41 ++++++--------------
 tests/services.scm        |   79 ++++++++++++++++++++++++++++++++++++-
 tests/system.scm          |    2 +-
 7 files changed, 200 insertions(+), 67 deletions(-)