docs: refresh installation instructions and general cleanup

Change-Id: Ibfe945887e5cad979c1f9a78fd5a3062bb20a8b5
diff --git a/docs/manpages/ndn-client.conf.rst b/docs/manpages/ndn-client.conf.rst
index d267c14..62f42ca 100644
--- a/docs/manpages/ndn-client.conf.rst
+++ b/docs/manpages/ndn-client.conf.rst
@@ -5,8 +5,8 @@
 
 The configuration file ``client.conf`` is looked up in several directories in the following order:
 
-- ``$HOME/.ndn/``: user-specific settings
-- ``@SYSCONFDIR@/ndn/`` (``/usr/local/etc/ndn``, ``/opt/local/etc/ndn``, or other, depending how the
+- ``$HOME/.ndn``: user-specific settings
+- ``@SYSCONFDIR@/ndn`` (``/usr/local/etc/ndn``, ``/opt/local/etc/ndn``, or other, depending how the
   library is configured): system-wide settings
 - ``/etc/ndn``: default system-wide settings
 
@@ -24,9 +24,10 @@
 
   By default, ``unix:///var/run/nfd.sock`` is used.
 
-  ..note::
+  .. note::
     This value can be overridden using the ``NDN_CLIENT_TRANSPORT`` environment variable.
 
+
 Key Management
 --------------
 
@@ -55,10 +56,10 @@
 
       rm -rf ~/.ndn/ndnsec-*
 
-  It's not recommended to share the same directory between machines, e.g. via NFS.
+  It is not recommended to share the same directory between machines, e.g. via NFS.
   Simultaneous access from multiple machines may cause errors.
 
-  ..note::
+  .. note::
     This value can be overridden using the ``NDN_CLIENT_PIB`` environment variable.
 
 tpm
@@ -69,15 +70,15 @@
 
   Possible values for ``[scheme]``:
 
-  * ``tpm-osx-keychain`` (default on OS X platform): secure storage of private keys in OS X
+  * ``tpm-osx-keychain`` (default on macOS): secure storage of private keys in the macOS
     Keychain with OS-provided access restrictions.
 
     ``[location]`` parameter is ignored.
 
-    May not work for daemon applications, as user interaction may be required to access OS X
-    Keychain.
+    May not work for daemon applications, as user interaction may be required to access the
+    macOS Keychain.
 
-  * ``tpm-file`` (default on all other platforms): file-based storage of private keys
+  * ``tpm-file`` (default on all other platforms): file-based storage of private keys.
 
     Possible values for ``[location]``:
 
@@ -90,11 +91,11 @@
 
      tpm=tpm-file
 
-  **Change of ``tpm`` setting is only possible together with ``pib`` setting. Otherwise, an
-  error will be generated during PIB/TPM access**
+  **Changing the ``tpm`` setting is only possible together with ``pib`` setting. Otherwise,
+  an error will be generated during PIB/TPM access.**
 
-  It's not recommended to share the same directory between machines, e.g. via NFS.
+  It is not recommended to share the same directory between machines, e.g. via NFS.
   Simultaneous access from multiple machines may cause errors.
 
-  ..note::
+  .. note::
     This value can be overridden using the ``NDN_CLIENT_TPM`` environment variable.