Normalize some timeouts in scripts

Added use of stdnse.parse_timespec for timeout args. Used comm.lua
default timeouts in a couple cases. Corrected 2 cases of incorrect
documentation ("Default 60" when the default was 30 seconds).

scripts/acarsd-info.nse

@@ -52,7 +52,7 @@ action = function(host, port)
   local result = {}
 
   -- Set timeout
-  local timeout = tonumber(nmap.registry.args[SCRIPT_NAME .. '.timeout'])
+  local timeout = stdnse.parse_timespec(stdnse.get_script_args(SCRIPT_NAME .. ".timeout"))
   if not timeout or timeout < 0 then timeout = 10 end
 
   -- Set bytes

scripts/ganglia-info.nse

@@ -25,9 +25,7 @@ For more information about Ganglia, see:
 -- nmap --script ganglia-info --script-args ganglia-info.timeout=60,ganglia-info.bytes=1000000 -p <port> <target>
 --
 -- @args ganglia-info.timeout
---       Set the timeout in seconds. The default value is 60.
---       This should be enough for a grid of more than 100 hosts at 200Kb/s.
---       About 5KB-10KB of data is returned for each host in the cluster.
+--       Set the timeout in seconds. The default value is 30.
 -- @args ganglia-info.bytes
 --       Set the number of bytes to retrieve. The default value is 1000000.
 --       This should be enough for a grid of more than 100 hosts.
@@ -92,24 +90,16 @@ action = function( host, port )
   local result = {}
 
   -- Set timeout
-  local timeout = nmap.registry.args[SCRIPT_NAME .. '.timeout']
-  if not timeout then
-    timeout = 30
-  else
-    tonumber(timeout)
-  end
+  local timeout = stdnse.parse_timespec(stdnse.get_script_args(SCRIPT_NAME .. '.timeout'))
+  timeout = timeout or 30
 
   -- Set bytes
-  local bytes = nmap.registry.args[SCRIPT_NAME .. '.bytes']
-  if not bytes then
-    bytes = 1000000
-  else
-    tonumber(bytes)
-  end
+  local bytes = stdnse.get_script_args(SCRIPT_NAME .. '.bytes')
+  bytes = tonumber(bytes) or 1000000
 
   -- Retrieve grid data in XML format over TCP
   stdnse.debug1("Connecting to %s:%s", host.targetname or host.ip, port.number)
-  local status, data = comm.get_banner(host, port, {timeout=timeout*1000,bytes=bytes})
+  local status, data = comm.get_banner(host, port, {request_timeout=timeout*1000,bytes=bytes})
   if not status then
     stdnse.debug1("Timeout exceeded for %s:%s (Timeout: %ss).", host.targetname or host.ip, port.number, timeout)
     return

scripts/mikrotik-routeros-brute.nse

@@ -27,10 +27,12 @@ license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
 categories = {"intrusive", "brute"}
 
 local shortport = require "shortport"
-local comm = require "comm"
+local bin = require "bin"
 local brute = require "brute"
 local creds = require "creds"
+local nmap = require "nmap"
 local stdnse = require "stdnse"
+local string = require "string"
 local openssl = stdnse.silent_require "openssl"
 
 portrule = shortport.portnumber(8728, "tcp")
@@ -88,13 +90,12 @@ Driver =
 }
 
 action = function(host, port)
-  local result
   local thread_num = stdnse.get_script_args(SCRIPT_NAME..".threads") or 1
   local options = {timeout = 5000}
   local bengine = brute.Engine:new(Driver, host, port, options)
 
   bengine:setMaxThreads(thread_num)
   bengine.options.script_name = SCRIPT_NAME
-  _, result = bengine:start()
+  local _, result = bengine:start()
   return result
 end

scripts/qconn-exec.nse

@@ -41,7 +41,7 @@ For more information about QNX QCONN, see:
 -- |_      http://metasploit.org/modules/exploit/unix/misc/qnx_qconn_exec
 --
 -- @args qconn-exec.timeout
---                 Set the timeout in seconds. The default value is 60.
+--                 Set the timeout in seconds. The default value is 30.
 --
 -- @args qconn-exec.bytes
 --                 Set the number of bytes to retrieve. The default value is 1024.

scripts/weblogic-t3-info.nse

@@ -17,8 +17,7 @@ end
 
 action = function(host, port)
   local status, result = comm.exchange(host, port,
-    "t3 12.1.2\nAS:2048\nHL:19\n\n",
-    {proto=port.protocol, timeout=5000})
+    "t3 12.1.2\nAS:2048\nHL:19\n\n")
 
   if (not status) then
     return nil