Fix a typo

doc/ss-local.asciidoc

@@ -10,9 +10,10 @@ SYNOPSIS
 *ss-local*
  [-Auv] [-h|--help]
  [-s <server_host>] [-p <server_port>] [-l <local_port>]
- [-k <password>] [-m <encrypt_method>] [-f <pid_file>] [-t <timeout>]
- [-c <config_file>] [-b <interface>] [-a <user_name>]
- [-n <nofile>] [--fast-open] [--acl <acl_config>] [--mtu <MTU>]
+ [-k <password>] [-m <encrypt_method>] [-f <pid_file>]
+ [-t <timeout>] [-c <config_file>] [-i <interface>]
+ [-a <user_name>] [-b <local_address] [-n <nofile>]
+ [--fast-open] [--acl <acl_config>] [--mtu <MTU>]
 
 DESCRIPTION
 -----------

doc/ss-server.asciidoc

@@ -13,8 +13,8 @@ SYNOPSIS
  [-k <password>] [-m <encrypt_method>] [-f <pid_file>]
  [-t <timeout>] [-c <config_file>] [-i <interface>]
  [-a <user_name>] [-d <addr>] [-n <nofile>]
- [--fast-open] [--acl <acl_config>] [--mtu <MTU>]
- [--manager-address <path_to_unix_domain>]
+ [-b <local_address] [--fast-open] [--acl <acl_config>]
+ [--mtu <MTU>] [--manager-address <path_to_unix_domain>]
 
 DESCRIPTION
 -----------