branch master updated (e5f3d11 -> a9468b4)

[Ludovic Courtès]

civodul pushed a change to branch master
in repository guix.

      from  e5f3d11   gnu: libffcall: Update to 2.0.
       new  8514662   gnu: Add monero.
       new  79228a5   gnu: Add monero-core.
       new  218f6ec   substitute: Make substitute URLs a SRFI-39 parameter.
       new  a9468b4   substitute: Download from unauthorized sources that 
provide the right content.

The 4 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               |  28 ++++++-
 gnu/packages/finance.scm    | 183 +++++++++++++++++++++++++++++++++++++++++
 guix/scripts/substitute.scm | 152 ++++++++++++++++++++++------------
 tests/substitute.scm        | 193 ++++++++++++++++++++++++++++++++++++++++----
 4 files changed, 486 insertions(+), 70 deletions(-)