Rename scripts (almost all of them) to make their names more consistent and

make them look better in output. The full list of changes is
  anonFTP => ftp-anon
  ASN => asn-query
  brutePOP3 => pop3-brute
  bruteTelnet => telnet-brute
  daytimeTest => daytime
  dns-safe-recursion-port => dns-random-srcport
  dns-safe-recursion-txid => dns-random-txid
  dns-test-open-recursion => dns-recursion
  ftpbounce => ftp-bounce
  HTTPAuth => http-auth
  HTTP_open_proxy => http-open-proxy
  HTTPpasswd => http-passwd
  HTTPtrace => http-trace
  iax2Detect => iax2-version
  ircServerInfo => irc-info
  ircZombieTest => irc-zombie
  MSSQLm => ms-sql-info
  MySQLinfo => mysql-info
  popcapa => pop3-capabilities
  PPTPversion => pptp-version
  promiscuous => sniffer-detect
  RealVNC_auth_bypass => realvnc-auth-bypass
  robots => robots.txt
  showHTMLTitle => html-title
  showOwner => identd-owners
  skype_v2-version => skypev2-version
  smb-enumdomains => smb-enum-domains
  smb-enumsessions => smb-enum-sessions
  smb-enumshares => smb-enum-shares
  smb-enumusers => smb-enum-users
  smb-serverstats => smb-server-stats
  smb-systeminfo => smb-system-info
  SMTPcommands => smtp-commands
  SMTP_openrelay_test => smtp-open-relay
  SNMPcommunitybrute => snmp-brute
  SNMPsysdescr => snmp-sysdescr
  SQLInject => sql-injection
  SSH-hostkey => ssh-hostkey
  SSHv1-support => sshv1
  SSLv2-support => sslv2
  strangeSMTPport => smtp-strangeport
  UPnP-info => upnp-info
  xamppDefaultPass => xampp-default-auth
  zoneTrans => zone-transfer

scripts/snmp-sysdescr.nse

@@ -0,0 +1,113 @@
+description = [[
+Attempts to extract system information from an SNMP version 1 service.
+]]
+
+---
+-- @output
+-- |  snmp-sysdescr: HP ETHERNET MULTI-ENVIRONMENT,ROM A.25.80,JETDIRECT,JD117,EEPROM V.28.22,CIDATE 08/09/2006
+-- |_   System uptime: 28 days, 17:18:59 (248153900 timeticks)
+
+author = "Thomas Buchanan <tbuchanan@thecompassgrp.net>"
+
+license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
+
+categories = {"default", "discovery", "safe"}
+
+require "shortport"
+require "snmp"
+
+-- runs after SNMPcommunityprobe.nse
+runlevel = 2
+
+portrule = shortport.portnumber(161, "udp", {"open", "open|filtered"})
+
+---
+-- Sends SNMP packets to host and reads responses
+action = function(host, port)
+
+       	-- create the socket used for our connection
+	local socket = nmap.new_socket()
+	
+	-- set a reasonable timeout value
+	socket:set_timeout(5000)
+	
+	-- do some exception handling / cleanup
+	local catch = function()
+		socket:close()
+	end
+	
+	local try = nmap.new_try(catch)
+	
+	-- connect to the potential SNMP system
+	try(socket:connect(host.ip, port.number, "udp"))
+	
+	local payload
+	  
+	-- build a SNMP v1 packet
+	-- copied from packet capture of snmpget exchange
+	-- get value: 1.3.6.1.2.1.1.1.0 (SNMPv2-MIB::sysDescr.0)
+	local options = {}
+	options.reqId = 28428 -- unnecessary?
+	payload = snmp.encode(snmp.buildPacket(snmp.buildGetRequest(options, "1.3.6.1.2.1.1.1.0")))
+
+	try(socket:send(payload))
+	
+	local status
+	local response
+	
+	-- read in any response we might get
+	status, response = socket:receive_bytes(1)
+
+	if (not status) or (response == "TIMEOUT") then 
+		return
+	end
+	
+	-- since we got something back, the port is definitely open
+	nmap.set_port_state(host, port, "open")
+	
+	local result
+	result = snmp.fetchFirst(response)
+	
+	-- build a SNMP v1 packet
+	-- copied from packet capture of snmpget exchange
+	-- get value: 1.3.6.1.2.1.1.3.0 (SNMPv2-MIB::sysUpTime.0)
+	local options = {}
+	options.reqId = 28428
+	payload = snmp.encode(snmp.buildPacket(snmp.buildGetRequest(options, "1.3.6.1.2.1.1.3.0")))
+	
+	try(socket:send(payload))
+	
+	-- read in any response we might get
+	status, response = socket:receive_bytes(1)
+
+	if (not status) or (response == "TIMEOUT") then
+		return result
+	end
+	
+	try(socket:close())
+
+	local uptime = snmp.fetchFirst(response)
+
+	local days, hours, minutes, seconds, htime, mtime, stime
+	days = math.floor(uptime / 8640000)
+	htime = math.fmod(uptime, 8640000)
+	hours = math.floor(htime / 360000)
+	mtime = math.fmod(htime, 360000)
+	minutes = math.floor(mtime / 6000)
+	stime = math.fmod(mtime, 6000)
+	seconds = stime / 100
+	
+	local dayLabel
+	
+	if days == 1 then
+		dayLabel = " day, "
+	else
+		dayLabel = " days, "
+	end
+	
+	result = result .. "\n  System uptime: " .. days .. dayLabel .. hours .. ":" .. minutes .. ":" .. seconds
+	result = result .. " (" .. tostring(uptime) .. " timeticks)"
+	
+	return result
+end
+