docs: fix some markup / linking issues

docs/deployment/central-backup-server.rst

@@ -1,5 +1,6 @@
 .. include:: ../global.rst.inc
 .. highlight:: none
+.. _central-backup-server:
 
 Central repository server with Ansible or Salt
 ==============================================

docs/deployment/pull-backup.rst

@@ -470,13 +470,13 @@ Make sure to use port ``8022`` and ``localhost`` for the repository as this inst
 remote forwarded ssh connection.
 
 SSH Keys
-~~~~~~~~
+--------
 
 If you want to automate backups when using this method, the ssh ``known_hosts`` and ``authorized_keys`` need to be set up
 to allow connections.
 
 Security Considerations
-~~~~~~~~~~~~~~~~~~~~~~~
+-----------------------
 
 Opening up SSH access this way can pose a security risk as it effectively opens remote access to your
 backup server on the client even if it is located outside of your company network.
@@ -496,7 +496,7 @@ All the additional security considerations for borg should be applied, see :ref:
 hints.
 
 More information
-~~~~~~~~~~~~~~~~
+----------------
 
 See `remote forwarding`_ and the `ssh man page`_ for more information about remote forwarding.
 

docs/faq.rst

@@ -25,7 +25,7 @@ running on the remote side, so *every* operation needs to go over the network,
 which is slower.
 
 Can I back up from multiple servers into a single repository?
-------------------------------------------------------------
+-------------------------------------------------------------
 
 In order for the deduplication used by Borg to work, it
 needs to keep a local cache containing checksums of all file
@@ -162,7 +162,7 @@ file is being processed.
 
 
 How can I back up huge file(s) over a unstable connection?
----------------------------------------------------------
+----------------------------------------------------------
 
 Yes. For more details, see :ref:`checkpoints_parts`.
 
@@ -744,7 +744,7 @@ This has some pros and cons, though:
 The long term plan to improve this is called "borgception", see :issue:`474`.
 
 Can I back up my root partition (/) with Borg?
----------------------------------------------
+----------------------------------------------
 
 Backing up your entire root partition works just fine, but remember to
 exclude directories that make no sense to back up, such as /dev, /proc,