documentation/conf.py: define a manpage url

By defining the manpages_url we can use the :manpage: role in the
documentation for providing links to manpages. See:
https://www.sphinx-doc.org/en/master/usage/configuration.html#confval-manpages_url

Replace existing manpages links to use this role.

Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
(From yocto-docs rev: f5c964f41ed0f9a9740769e40aabf543df274c03)

Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
(cherry picked from commit 4e63cd74cd1a330ea5e96bb04243a90f607b2857)
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 2 deletions

diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst
index 0939994497..63a094413c 100644
--- a/documentation/ref-manual/variables.rst
+++ b/documentation/ref-manual/variables.rst
@@ -4426,8 +4426,7 @@ system and gives an overview of their function and contents.
 
       The value in :term:`INITSCRIPT_PARAMS` is passed through to the
       ``update-rc.d`` command. For more information on valid parameters,
-      please see the ``update-rc.d`` manual page at
-      https://manpages.debian.org/buster/init-system-helpers/update-rc.d.8.en.html
+      please see the manual page: :manpage:`update-rc.d <update-rc.d(8)>`.
 
    :term:`INSANE_SKIP`
       Specifies the QA checks to skip for a specific package within a