docs: minor fixes to various examples

doc/repmgr-witness-unregister.sgml

@@ -41,7 +41,7 @@
     <para>
       Unregistering a non-running witness node:
       <programlisting>
-        $ repmgr -f /etc/repmgr.conf witness unregister -h localhost -p 5501  -F
+        $ repmgr -f /etc/repmgr.conf witness unregister -h node1 -p 5501  -F
         INFO: connecting to witness node "node3" (ID: 3)
         NOTICE: unable to connect to witness node "node3" (ID: 3), removing node record on cluster primary only
         INFO: unregistering witness node 3

doc/switchover.sgml

@@ -101,7 +101,7 @@
     <programlisting>
       $ repmgr standby switchover -f /etc/repmgr.conf --siblings-follow --dry-run
       NOTICE: checking switchover on node "node2" (ID: 2) in --dry-run mode
-      INFO: SSH connection to host "localhost" succeeded
+      INFO: SSH connection to host "node1" succeeded
       INFO: archive mode is "off"
       INFO: replication lag on this standby is 0 seconds
       INFO: all sibling nodes are reachable via SSH
@@ -133,7 +133,7 @@
     INFO: searching for primary node
     INFO: checking if node 1 is primary
     INFO: current primary node is 1
-    INFO: SSH connection to host "localhost" succeeded
+    INFO: SSH connection to host "node1" succeeded
     INFO: archive mode is "off"
     INFO: replication lag on this standby is 0 seconds
     NOTICE: local node "node2" (ID: 2) will be promoted to primary; current primary "node1" (ID: 1) will be demoted to standby

doc/upgrading-repmgr.sgml

@@ -167,7 +167,7 @@
     $ ./convert-config.pl /etc/repmgr.conf
     node_id=2
     node_name=node2
-    conninfo=host=localhost dbname=repmgr user=repmgr connect_timeout=2
+    conninfo=host=node2 dbname=repmgr user=repmgr connect_timeout=2
     pg_ctl_options='-l /var/log/postgres/startup.log'
     rsync_options=--exclude=postgresql.local.conf --archive
     log_level=INFO