dev-manual: Updates to "Using .bbappend Files in Your Layer"

I did some rewriting for clarity in the "Using .bbappend Files
in Your Layer" section.  The section needed to be retitled so
focus on the layer aspect of .bbappend files.  Also, while I
was in there, I did more work on the prose in general.

Also had to fix some links in the bsp, kernel, and ref manuals
that linked into the section whose name I changes.

(From yocto-docs rev: a82bcc9fe0f909135434ee1bd36b4414f6c046c9)

Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/documentation/ref-manual/introduction.xml b/documentation/ref-manual/introduction.xml
index 4fd1e95a61..163ea925f1 100644
--- a/documentation/ref-manual/introduction.xml
+++ b/documentation/ref-manual/introduction.xml
@@ -689,7 +689,7 @@
                 <para>Information in append files extends or overrides the
                 information in the similarly-named recipe file.
                 For an example of an append file in use, see the
-                "<ulink url='&YOCTO_DOCS_DEV_URL;#using-bbappend-files'>Using .bbappend Files</ulink>"
+                "<ulink url='&YOCTO_DOCS_DEV_URL;#using-bbappend-files'>Using .bbappend Files in Your Layer</ulink>"
                 section in the Yocto Project Development Manual.
                 <note>
                     Append files can also use wildcard patterns in their