Add some missing library requires. Patch generated by

$ nse_check_globals --patch

with some modifications for format consistency.

nselib/isns.lua

@@ -8,8 +8,10 @@ local bin    = require('bin')
 local bit    = require('bit')
 local ipops  = require('ipOps')
 local match  = require('match')
+local nmap = require('nmap')
 local stdnse = require('stdnse')
 local tab    = require('tab')
+local table = require('table')
 _ENV = stdnse.module("isns", stdnse.seeall);
 
 iSCSI = {

nselib/smb.lua

@@ -123,6 +123,7 @@
 -----------------------------------------------------------------------
 local bin = require "bin"
 local bit = require "bit"
+local coroutine = require "coroutine"
 local io = require "io"
 local math = require "math"
 local netbios = require "netbios"

scripts/eppc-enum-processes.nse

@@ -1,5 +1,7 @@
-local shortport = require('shortport')
 local bin       = require('bin')
+local nmap      = require('nmap')
+local shortport = require('shortport')
+local stdnse    = require('stdnse')
 local tab       = require('tab')
 
 description = [[

scripts/http-huawei-hg5xx-vuln.nse

@@ -1,3 +1,9 @@
+local http = require "http"
+local nmap = require "nmap"
+local shortport = require "shortport"
+local string = require "string"
+local vulns = require "vulns"
+
 description = [[
 Detects Huawei modems models HG530x, HG520x, HG510x (and possibly others...) vulnerable to a remote credential and information disclosure vulnerability. It also extracts the PPPoE credentials 
 and other interesting configuration values. 
@@ -52,10 +58,6 @@ author = "Paulino Calderon <calderon () websec mx>"
 license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
 categories = {"exploit","version","vuln"}
 
-local shortport = require "shortport"
-local http = require "http"
-local vulns = require "vulns"
-
 portrule = shortport.http
 
 action = function(host, port)

scripts/isns-info.nse

@@ -2,6 +2,7 @@ local stdnse    = require "stdnse"
 local shortport = require "shortport"
 local isns      = require "isns"
 local tab       = require "tab"
+local table     = require "table"
 
 description = [[
 Lists portals and iSCSI nodes registered with the Internet Storage Name

scripts/rmi-vuln-classloader.nse

@@ -1,7 +1,9 @@
+local bin = require "bin"
+local rmi = require "rmi"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
+local string = require "string"
 local vulns = require "vulns"
-local rmi = require "rmi"
 
 description = [[
 Checks if rmiregistry allows class loading.

scripts/smb-ls.nse

@@ -2,6 +2,7 @@ local bit    = require 'bit'
 local smb    = require 'smb'
 local stdnse = require 'stdnse'
 local tab    = require 'tab'
+local table = require "table"
 local openssl= require 'openssl'
 
 description = [[