Added missing sasl config file

qemud/libvirtd.sasl

+# If you want to use the non-TLS socket, then you *must* include
+# the GSSAPI or DIGEST-MD5 mechanisms, because they are the only 
+# ones that can offer session encryption as well as authentication.
+#
+# If you're only using TLS, then you can turn on any mechanisms
+# you like for authentication, because TLS provides the encryption
+#
+# Default to a simple username+password mechanism
+mech_list: digest-md5
+
+# Before you can use GSSAPI, you need a service principle on the
+# KDC server for libvirt, and that to be exported to the keytab
+# file listed below
+#mech_list: gssapi
+#
+# You can also list many mechanisms at once, then the user can choose
+# by adding  '?auth=sasl.gssapi' to their libvirt URI, eg
+#   qemu+tcp://hostname/system?auth=sasl.gssapi
+#mech_list: digest-md5 gssapi
+
+# MIT kerberos ignores this option & needs KRB5_KTNAME env var.
+# May be useful for other non-Linux OS though....
+keytab: /etc/libvirt/krb5.tab
+
+# If using digest-md5 for username/passwds, then this is the file
+# containing the passwds. Use 'saslpasswd2 -a libvirt [username]'
+# to add entries, and 'sasldblistusers2 -a libvirt' to browse it
+sasldb_path: /etc/libvirt/passwd.db