Release notes clean up for the upcoming release

Also adds a missing documentation bit and specific versions for pike notes.

Change-Id: I186fe35cdd7a03702c993cae6468ef2d8151778a

doc/source/admin/how_it_works.rst

@@ -93,7 +93,9 @@ fields:
 ``disks``
     list of disk block devices with fields: ``name``, ``model``,
     ``size`` (in bytes), ``rotational`` (boolean), ``wwn``, ``serial``,
-    ``vendor``, ``wwn_with_extension``, ``wwn_vendor_extension``, ``hctl``.
+    ``vendor``, ``wwn_with_extension``, ``wwn_vendor_extension``, ``hctl``
+    and ``by_path`` (the full disk path, in the form
+    ``/dev/disk/by-path/<rest-of-path>``).
 
 ``interfaces``
     list of network interfaces with fields: ``name``, ``mac_address``,

releasenotes/notes/fix-hardcoded-path-to-grub-7006f29a9ef72e75.yaml

@@ -1,6 +1,5 @@
 ---
 fixes:
-  - Uses the PATH environment variable to get the grub (or grub2)
-    binary instead of assuming it is in /usr/sbin. This provides
-    flexibilty for grub to be installed in any PATH directory,
-    on a partitioned image.
+  - Uses the ``PATH`` environment variable to get the grub2 binary location
+    instead of assuming it to be ``/usr/sbin``. This fixes installing a boot
+    loader when the grub2 binary is located somewhere else.

releasenotes/notes/inspection-to-report-disk-by-path-e3fd4c331d200903.yaml

@@ -1,4 +1,7 @@
 ---
 features:
-  - The /dev/disk/by-path/XXX device name is added to the storage
-    hardware inspection report.
+  - Adds the new field ``by_path`` to disks in the inventory. Its value is
+    the full device path, in the form ``/dev/disk/by-path/<rest-of-path>``.
+
+    With ``ironic-lib`` version 2.11 or newer it is possible to use this field
+    in root device hints.

releasenotes/source/pike.rst

@@ -1,6 +1,6 @@
-===================================
- Pike Series Release Notes
-===================================
+==========================================
+ Pike Series (2.1.0 - 2.2.x) Release Notes
+==========================================
 
 .. release-notes::
    :branch: stable/pike