Suggested by Pjotr Prins.

* posts/hpc-goodies-in-guix-0.15.0.md (tags): Add sentence about 1.0.

* posts/hpc-goodies-in-guix-0.15.0.md: Fix date.

* posts/hpc-goodies-in-guix-0.15.0.md: New file.

* about.md: Add CERN talk.

* about.md: Fix typo.  Adjust.

* getting-started.md: Update package count.

* posts/pigx.md: New file.

* about.md (Talks & Papers): Add FOSDEM talk and reproducible pipeline
paper.

* posts/binary-performance.md: Add update for FFTW.

* nginx.conf: Add 'location' block for /.well-known.

See <https://github.com/UMCUGenetics/hpcguix-web>.

* hpcweb-config.scm: New file.
* nginx-locations.conf: Rewrite /browse URLs.
Add 'location' blocks for /static.
* browse: Remove.

* posts/cluster-installation.md: Fix typos in file names.

* posts/binary-performance.md: Typo.

* posts/binary-performance.md: Fix typos reported by rekado.

* posts/binary-performance.md: New file.

* posts/fosdem-2018.md: Fix URL.

* posts/fosdem-2018.md: New file.

* posts/hpc-goodies-in-guix-0.14.0.md: New file.

'scheme-variable-name' was crashing for 'blis', for example, because the
definition was to be found below rather than above the 'package' form
that defines it.

* browse/www/pages/package.scm (scheme-variable-name): Remove.
(package->variable-name): New procedure.
(page-package): Use it.

Previously hpc.guixsd.org would server the wrong certificate.

* nginx.conf: Move 'ssl_protocols', 'ssl_ciphers', etc. to the top
level.  Add 'server' block for hpc.guixsd.org.

* getting-started.md (frontpage): Fix URL.

* getting-started.md (Installing Guix): Add link to cluster-install article.

* posts/cluster-installation.md (Summary): Fix typo.

* posts/cluster-installation.md: New file.

* getting-started.md: Nitpick.
* guix-hpc.scm (base-layout): Add #:posts and #:site.
[post->brief]: New procedure.
Use it to generate a "latest news" block on the front page.
(read-markdown-page): Add 'posts' and 'site' parameters and pass them to
'base-layout'.
(static-pages): Return lambdas.
* haunt.scm: Remove 'map' around 'static-pages' call.
* static/css/main.css (.latest-news): New.
(.news-brief): New.

* about.md (title): Add PlaFRIM.

* haunt.scm (summarize-post): New procedure.
(post->sxml): Add #:summarize? and honor it.
(page->sxml): Pass #:summarize? #t.

This avoids transferring all of /packages.json every time one reloads
the page.

* browse/web-interface.scm (request-packages-json-handler): Add
'request' parameter.  Pass it to 'request-file-handler'.
(request-file-handler): Add 'request' parameter.   Add a "Last-Modified"
header on responses, and honor "If-Modified-Since".
(request-handler): Adjust accordingly.

* browse/web-interface.scm (request-file-handler): Call 'stat' upfront.
Remove 'file-exists?' call.

* browse/web-interface.scm (request-packages-json-handler): Use 'remove'
instead of 'lset-difference'.

* browse/web-interface.scm (request-packages-json-handler): Use
'with-atomic-file-output'.

* nginx-locations.conf (@gnupackages): New location.
(/browse, /package): Use @gnupackages as a fallback.

* getting-started.md: Make 'guix package -s' example narrower.

* getting-started.md (Sending Guix Packages to Guix-less Machines): New
section.

* getting-started.md: Shrink 'guix package -s' example.

* static/css/main.css (width-control): Adjust.

Fixes a regression introduced in
372f5f48.

* static/css/main.css: Fix 'h2' lines, which included merge conflict
markers.

* posts/guix-without-root.md: Fix typo.

* posts/guix-without-root.md: Fix typo.

* posts/guix-without-root.md: New file.