[PATCH v2 1/3] documentation/README: improve BitBake manual referencing guidelines

["Michael Opdenacker" <michael.opdenacker@bootlin.com>]

Removing the ":ref:`-D <bitbake:..." syntax as it's not necessary
Adding more and simpler ways of making references to the BitBake
manual.

Signed-off-by: Michael Opdenacker <michael.opdenacker@bootlin.com>
---
 documentation/README | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/documentation/README b/documentation/README
index f9e803a28b..fad19683c1 100644
--- a/documentation/README
+++ b/documentation/README
@@ -328,10 +328,19 @@ The sphinx.ext.intersphinx extension is enabled by default
 so that we can cross reference content from other Sphinx based
 documentation projects, such as the BitBake manual.
 
-References to the bitbake manual can be done like this:
+References to the BitBake manual can be done:
+ - With a specific description instead of the section name:
+  :ref:`Azure Storage fetcher (az://) <bitbake:bitbake-user-manual/bitbake-user-manual-fetching:fetchers>`
+ - With the section name:
+  ":ref:`bitbake:bitbake-user-manual/bitbake-user-manual-intro:usage and syntax` option
+ - Linking to the entire BitBake manual:
+  :doc:`BitBake User Manual <bitbake:index>`
+
+Note that a reference to a variable (:term:`VARIABLE`) automatically points to
+the BitBake manual if the variable is not described in the Reference Manual's Variable Glossary.
+However, if you need to bypass this, you can explicitely refer to a description in the
+BitBake manual as follows:
 
-  See the ":ref:`-D <bitbake:bitbake-user-manual/bitbake-user-manual-intro:usage and syntax>`" option
-or
   :term:`bitbake:BB_NUMBER_PARSE_THREADS`
 
 Submitting documentation changes
-- 
2.25.1