* doc/build.scm (texinfo-manual-source)[build]: Use 'file-append', not
'file-append*', for 'htmlxref.cnf', to ensure it has the right basename.

* doc/build.scm (guile-lib/htmlprag-fixed)[source]: Remove.
[arguments]: Add 'fix-htmlprag' phase.

* doc/guix.texi (Running Guix in a VM): Replace reference to
/etc/config.scm with a link to the repo.

When running the installation image off a DVD, early I/O operations are
extremely slow, to the point that something like dbus-daemon would need
~20s to start.  This change works around the issue.

Fixes <https://bugs.gnu.org/40572>.
Reported by Florian Pelz <pelzflorian@pelzflorian.de>.

* gnu/services/shepherd.scm (shepherd-configuration-file): Set
%pid-file-timeout to 30.

This allows us to catch "operating_002dsystem-1", for instance.

* doc/build.scm (syntax-highlighted-html)[build](anchor-id->key): Drop
"-1" & co. from ID.

This is a followup to da9deba13d551e316f5a99a614834efa27ddc7d1.

Last-minute modification of the 'match' pattern would lead to an error:

  "multiple ellipsis patterns not allowed at same level"

* doc/build.scm (syntax-highlighted-html)[build](collect-anchors):
Add 'worthy-entry?' procedure and use it instead of the unsupported
pattern for ('dt ...).

This makes it easier to jump to the definition of a procedure or
variable when looking at a code snippet.  There can be false-positive
because scoping rules are ignored, for example, but it should be a good
approximation.

* doc/build.scm (syntax-highlighted-html)[build](highlights->sxml*): Add
'anchors' parameter.  Add clause for ('symbol text).
(syntax-highlight): Add 'anchors' parameter.  Wrap body in named let and
use it in recursive calls.  Pass ANCHORS to 'highlights->sxml*'.
(underscore-decode, anchor-id->key, collect-anchors, html?): New procedures.
(process-file): Add 'anchors' parameter. and honor it.
Rewrite mono-node and multi-node HTML files separately.