Document HDF5 plugin extra dimension name records

Document them close to their dimension size related records, so that it
is easier to follow the documentation, and to follow their placement in
the database template file.

Author: henriquesimoes

docs/ADCore/NDFileHDF5.rst

@@ -737,18 +737,36 @@ Parameters and Records
     - HDF5_extraDimSizeN
     - $(P)$(R)ExtraDimSizeN, $(P)$(R)ExtraDimSizeN_RBV
     -
+  * - asynOctet
+    - r/o
+    - HDF5_extraDimNameN
+    - Name of extra dimension N
+    - $(P)$(R)ExtraDimNameN_RBV
+    - stringin
   * - asynInt32
     - r/w
     - Size of extra dimension X
     - HDF5_extraDimSizeX
     - $(P)$(R)ExtraDimSizeX, $(P)$(R)ExtraDimSizeX_RBV
     - longout, longin
+  * - asynOctet
+    - r/o
+    - Name of extra dimension X
+    - HDF5_extraDimNameX
+    - $(P)$(R)ExtraDimNameX_RBV
+    - stringin
   * - asynInt32
     - r/w
     - Size of extra dimension Y
     - HDF5_extraDimSizeY
     - $(P)$(R)ExtraDimSizeY, $(P)$(R)ExtraDimSizeY_RBV
     - longout, longin
+  * - asynOctet
+    - r/o
+    - Name of extra dimension Y
+    - HDF5_extraDimNameY
+    - $(P)$(R)ExtraDimNameY_RBV
+    - stringin
   * - asynInt32
     - r/w
     - Size of the K'th extra dimension, for K in [3..9]
@@ -757,6 +775,14 @@ Parameters and Records
 
       E.g. $(P)$(R)ExtraDimSize3_RBV
     - longout, longin
+  * - asynOctet
+    - r/o
+    - Name of the K'th extra dimension, for K in [3..9]
+    - HDF5_extraDimName<K>
+    - $(P)$(R)ExtraDimName<K>_RBV
+
+      E.g $(P)$(R)ExtraDimName8_RBV
+    - stringin
   * -
     -
     - **Positional Placement**