dev-manual; ref-manual: Updates to replace "smart" with "dnf"

Fixes [YOCTO #9675]

Various fixes to replace the "smart" package manager references
with "dnf".

(From yocto-docs rev: 721dc7fb637c4c03534eb19f61b0b08a7303826d)

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

documentation/ref-manual/closer-look.xml

@@ -1054,7 +1054,7 @@
 
             <para>
                 Package installation is under control of the package manager
-                (e.g. smart/rpm, opkg, or apt/dpkg) regardless of whether or
+                (e.g. dnf/rpm, opkg, or apt/dpkg) regardless of whether or
                 not package management is enabled for the target.
                 At the end of the process, if package management is not
                 enabled for the target, the package manager's data files

documentation/ref-manual/ref-classes.xml

@@ -2374,7 +2374,7 @@
 
     <para>
         If you take the optional step to set up a repository (package feed)
-        on the development host that can be used by Smart, you can
+        on the development host that can be used by Dnf, you can
         install packages from the feed while you are running the image
         on the target (i.e. runtime installation of packages).
         For more information, see the

documentation/ref-manual/ref-variables.xml

@@ -14352,8 +14352,9 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
                     <note>
                         The <filename>TEST_SERVER_IP</filename> variable
                         is only used for a small number of tests such as
-                        the "smart" test suite, which needs to download
-                        packages from <filename>DEPLOY_DIR/rpm</filename>.
+                        the "dnf" test suite, which needs to download
+                        packages from
+                        <filename>WORKDIR/oe-rootfs-repo</filename>.
                     </note>
                 </para>
             </glossdef>