updates sample ansible.cfg (#23045) (#23050)

* adds host_key_auto_add to paramiko section
* adds look_for_keys to paramiko section
* adds terminal_plugins to defaults section
* adds persistent_connection section and key/value enteries
(cherry picked from commit ccfa464464)

examples/ansible.cfg

@@ -181,6 +181,7 @@
 #vars_plugins       = /usr/share/ansible/plugins/vars
 #filter_plugins     = /usr/share/ansible/plugins/filter
 #test_plugins       = /usr/share/ansible/plugins/test
+#terminal_plugins   = /usr/share/ansible/plugins/terminal
 #strategy_plugins   = /usr/share/ansible/plugins/strategy
 
 
@@ -305,6 +306,19 @@
 # line to disable this behaviour.
 #pty=False
 
+# paramiko will default to looking for SSH keys initially when trying to
+# authenticate to remote devices.  This is a problem for some network devices
+# that close the connection after a key failure.  Uncomment this line to
+# disable the Paramiko look for keys function
+#look_for_keys = False
+
+# When using persistent connections with Paramiko, the connection runs in a
+# background process.  If the host doesn't already have a valid SSH key, by
+# default Ansible will prompt to add the host key.  This will cause connections
+# running in background processes to fail.  Uncomment this line to have
+# Paramiko automatically add host keys.
+#host_key_auto_add = True
+
 [ssh_connection]
 
 # ssh arguments to use
@@ -357,6 +371,26 @@
 # only be disabled if your sftp version has problems with batch mode
 #sftp_batch_mode = False
 
+[persistent_connection]
+
+# Configures the persistent connection timeout value in seconds.  This value is
+# how long the persistent connection will remain idle before it is destroyed.  
+# If the connection doesn't receive a request before the timeout value 
+# expires, the connection is shutdown.  The default value is 30 seconds.
+connect_timeout = 30
+
+# Configures the persistent connection retries.  This value configures the
+# number of attempts the ansible-connection will make when trying to connect
+# to the local domain socket.  The default value is 30.
+connect_retries = 30
+
+# Configures the amount of time in seconds to wait between connection attempts 
+# to the local unix domain socket.  This value works in conjunction with the
+# connect_retries value to define how long to try to connect to the local
+# domain socket when setting up a persistent connection.  The default value is
+# 1 second.
+connect_interval = 1
+
 [accelerate]
 #accelerate_port = 5099
 #accelerate_timeout = 30