[config-ref] Improve HPE manila driver

General edits.
Follow conventions for markup.

Change-Id: I2f45f97163bb7a1a1330df85a1e6235556c98438

doc/config-ref-rst/source/shared-file-systems/drivers/hpe-3par-share-driver.rst

@@ -154,80 +154,84 @@ an administrator to control which share types are allowed to use FPGs
 with or without specific capabilities. The following extra-specs are
 used with the capabilities filter and the HPE 3PAR driver:
 
--  hpe3par_flash_cache = '<is> True' or '<is> False'
+``hpe3par_flash_cache``
+  This is ``True`` for back ends that have 3PAR's
+  Adaptive Flash Cache enabled.
 
--  thin_provisioning = '<is> True' or '<is> False'
+``thin_provisioning``
+  This is ``True`` for back ends that use thin provisioned volumes.
+  For FPGs that use fully provisioned volumes this is ``False``.
+  Back ends that use thin provisioning also support the Shared File
+  Systems service's over-subscription feature.
 
--  dedupe = '<is> True' or '<is> False'
+``dedupe``
+  This is ``True`` for back ends that use deduplication technology.
 
-hpe3par_flash_cache will be reported as True for back ends that have
-3PAR's Adaptive Flash Cache enabled.
-
-thin_provisioning will be reported as True for back ends that use thin
-provisioned volumes. FPGs that use fully provisioned volumes will report
-False. Backends that use thin provisioning also support the Shared File
-Systems service's over-subscription feature.
-
-dedupe will be reported as True for back ends that use deduplication
-technology.
+Each can either be ``<is> True`` or ``<is> False``.
 
 Scoped extra-specs are used to influence vendor-specific implementation
 details. Scoped extra-specs use a prefix followed by a colon. For HPE
-3PAR these extra-specs have a prefix of hpe3par.
+3PAR these extra-specs have a prefix of ``hpe3par``.
 
 The following HPE 3PAR extra-specs are used when creating CIFS (SMB)
 shares:
 
--  hpe3par:smb_access_based_enum = true or false
+``hpe3par:smb_access_based_enum``
+  Valid values are ``true`` or ``false``.
 
--  hpe3par:smb_continuous_avail = true or false
+  This handles access-based enumeration and specifies if users
+  can see only the files and directories to which they have been allowed
+  access on the shares. The default is ``false``.
 
--  hpe3par:smb_cache = off, manual, optimized or auto
+``hpe3par:smb_continuous_avail``
+  Valid values are ``true`` or ``false``.
 
-smb_access_based_enum (Access Based Enumeration) specifies if users
-can see only the files and directories to which they have been allowed
-access on the shares. The default is false.
+  This handles continuous availability and specifies if SMB3
+  continuous availability features should be enabled for this share.
+  If not specified, the default is ``true``.
 
-smb_continuous_avail (Continuous Availability) specifies if SMB3
-continuous availability features should be enabled for this share. If
-not specified, the default is true.
+``hpe3par:smb_cache``
+  This specifies client-side caching for offline files. Valid values
+  are:
 
-smb_cache specifies client-side caching for offline files. Valid values
-are:
+  ``off``
+    The client must not cache any files from this share. The share is
+    configured to disallow caching.
 
--  \`off\`: The client must not cache any files from this share. The
-   share is configured to disallow caching.
+  ``manual``
+    The client must allow only manual caching for the files open from
+    this share. This is the default.
 
--  \`manual\`: The client must allow only manual caching for the files
-   open from this share.
+  ``optimized``
+    The client may cache every file that it opens from this share.
+    Also, the client may satisfy the file requests from its local
+    cache. The share is configured to allow automatic caching of
+    programs and documents.
 
--  \`optimized\`: The client may cache every file that it opens from
-   this share. Also, the client may satisfy the file requests from its
-   local cache. The share is configured to allow automatic caching of
-   programs and documents.
-
--  \`auto\`: The client may cache every file that it opens from this
-   share. The share is configured to allow automatic caching of
-   documents.
-
--  If this is not specified, the default is manual.
+  ``auto``
+    The client may cache every file that it opens from this share. The
+    share is configured to allow automatic caching of documents.
 
 The following HPE 3PAR extra-specs are used when creating NFS shares:
 
--  hpe3par:nfs_options = Comma separated list of NFS export options.
+``hpe3par:nfs_options``
+  This is a comma-separated list of NFS export options.
 
-The NFS export options have the following limitations:
+  The NFS export options have the following limitations:
 
--  ro and rw are not allowed (will be determined by the driver).
+  -  ``ro`` and ``rw`` are not allowed because the value will be determined
+     by the driver.
 
--  no_subtree_check and fsid are not allowed per HPE 3PAR CLI support.
+  - ``no_subtree_check`` and ``fsid`` are not allowed per HPE 3PAR CLI
+    support.
 
--  (in)secure and (no\_)root_squash are not allowed because the HPE
-   3PAR driver controls those settings.
+  -  ``secure``, ``insecure``, ``root_squash``, and ``no_root_squash``
+     are not allowed because the HPE 3PAR driver controls those
+     settings.
 
-All other NFS options are forwarded to the HPE 3PAR as part of share
-creation. The HPE 3PAR will do additional validation at share creation
-time. Refer to HPE 3PAR CLI help for more details.
+  All other NFS options are forwarded to the HPE 3PAR as part of share
+  creation. The HPE 3PAR will do additional validation at share
+  creation time. Refer to the HPE 3PAR CLI help for more details.
 
 Driver options
 ~~~~~~~~~~~~~~