Add master_sign_pubkey option

salt/files/master.d/f_defaults.conf

@@ -375,6 +375,9 @@ client_acl_blacklist:
 {{ get_config('sign_pub_message', 'False') }}
 
 
+{{ get_config('master_sign_pubkey', 'False') }}
+
+
 #####    Master Module Management    #####
 ##########################################
 # Manage how master side modules are loaded.