Update documentation for classes split

* Make reference to meta/classes* instead of just meta/classes
* Update each reference to the path where the class has moved
* Add a brief explanation to the classes reference explaining the split
* Add a note to INHERIT, INHERIT_DISTRO, IMAGE_CLASSES and USER_CLASSES
  variable glossary entries mentioning where the specified classes must
  be located. I contemplated adding the same note to PACKAGE_CLASSES
  but decided against it, as it has a very specific usage and such a
  note might distract from the narrative of that entry.
* Also trim the IMAGE_CLASSES entry which was quite outdated.
* INHERIT += no longer works with testimage so drop the note about that

(From yocto-docs rev: e76bed00b452d3049f6c22afbfb980b557a141bd)

Signed-off-by: Paul Eggleton <paul.eggleton@microsoft.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/documentation/overview-manual/concepts.rst b/documentation/overview-manual/concepts.rst
index 35d6feb17a..a978e2cd7d 100644
--- a/documentation/overview-manual/concepts.rst
+++ b/documentation/overview-manual/concepts.rst
@@ -853,7 +853,7 @@ This step in the build process consists of the following tasks:
    variables. For information on how this variable works within that
    class, see the
    :ref:`autotools <ref-classes-autotools>` class
-   :yocto_git:`here </poky/tree/meta/classes/autotools.bbclass>`.
+   :yocto_git:`here </poky/tree/meta/classes-recipe/autotools.bbclass>`.
 
 -  *do_compile*: Once a configuration task has been satisfied,
    BitBake compiles the source using the
@@ -931,7 +931,7 @@ The :term:`FILES` variable defines the
 files that go into each package in
 :term:`PACKAGES`. If you want
 details on how this is accomplished, you can look at
-:yocto_git:`package.bbclass </poky/tree/meta/classes/package.bbclass>`.
+:yocto_git:`package.bbclass </poky/tree/meta/classes-global/package.bbclass>`.
 
 Depending on the type of packages being created (RPM, DEB, or IPK), the
 :ref:`do_package_write_* <ref-tasks-package_write_deb>`