branch master updated (c297e96 -> 77f9215)

[Chris Marusich]

marusich pushed a change to branch master
in repository guix.

      from  c297e96   gnu: procmail: Fix CVE-2017-16844.
       new  77f9215   doc: Split the "Substitutes" section into subsections.

The 1 revisions listed above as "new" are entirely new to this
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Summary of changes:
 doc/guix.texi | 132 +++++++++++++++++++++++++++++++++++++++++++---------------
 1 file changed, 98 insertions(+), 34 deletions(-)