Fix NSEdoc errors

1. All @table blocks must have an explicit @name
2. All @field blocks must have both a name and description

Also added some more information to the creds.States table description

nselib/creds.lua

@@ -105,7 +105,22 @@ _ENV = stdnse.module("creds", stdnse.seeall)
 
 
 --- Table mapping the different account states to their number
+--
+-- Also available is the <code>StateMsg</code> table, used to map these numbers
+-- to a description.
 -- @class table
+-- @name State
+-- @field LOCKED Account is locked
+-- @field VALID Valid credentials
+-- @field DISABLED Account is disabled
+-- @field CHANGEPW Valid credentials, password must be changed at next logon
+-- @field PARAM Credentials passed to script during Nmap execution
+-- @field EXPIRED Valid credentials, account expired
+-- @field TIME_RESTRICTED Valid credentials, account cannot log in at current time
+-- @field HOST_RESTRICTED Valid credentials, account cannot log in from current host
+-- @field LOCKED_VALID Valid credentials, account locked
+-- @field DISABLED_VALID Valid credentials, account disabled
+-- @field HASHED Hashed valid or invalid credentials
 State = {
   LOCKED = 1,
   VALID = 2,

nselib/ldap.lua

@@ -43,6 +43,7 @@ ERRORS = {
 
 --- Application constants
 -- @class table
+-- @name APPNO
 APPNO = {
   BindRequest = 0,
   BindResponse = 1,

nselib/smbauth.lua

@@ -810,13 +810,13 @@ end
 -- Host information for NTLM security
 -- @class table
 -- @name host_info
--- @field target_realm
+-- @field target_realm Target Name Data
--- @field netbios_computer_name
+-- @field netbios_computer_name Server name
--- @field netbios_domain_name
+-- @field netbios_domain_name Domain name
--- @field fqdn
+-- @field fqdn DNS server name
--- @field dns_domain_name
+-- @field dns_domain_name DNS domain name
--- @field dns_forest_name
+-- @field dns_forest_name DNS tree name
--- @field timestamp
+-- @field timestamp Timestamp
 
 ---
 -- Gets host info from a security blob