branch master updated (d381962 -> 66a30a3)

[Ludovic Courtès]

civodul pushed a change to branch master
in repository guix.

      from  d381962   gnu: Add powwow.
       new  cf557af   cve: Make CPE patch level part of the version string.
       new  baacf04   doc: Suggest `guix.scm' for upstream maintainers.
       new  ef0f0d5   gnu: vorbis-tools: Patch buffer overflow [fixes 
CVE-2015-6749].
       new  6a25e59   cve: Read entire CVE databases for the current year and 
the past year.
       new  66a30a3   gnu: libevent: Update to 2.0.22 [fixes CVE-2015-6525].

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:
 doc/guix.texi                                      |    2 +-
 gnu-system.am                                      |    1 +
 gnu/packages/libevent.scm                          |   11 ++--
 .../patches/vorbis-tools-CVE-2015-6749.patch       |   44 +++++++++++++
 gnu/packages/xiph.scm                              |    3 +-
 guix/cve.scm                                       |   66 +++++++++++++++-----
 6 files changed, 103 insertions(+), 24 deletions(-)
 create mode 100644 gnu/packages/patches/vorbis-tools-CVE-2015-6749.patch